Year
|
Annual
|
15-yr moving average
|
1720
|
130.0
|
|
1721
|
130.0
|
|
1722
|
78.0
|
|
1723
|
220.0
|
|
1724
|
78.0
|
|
1725
|
79.0
|
|
1726
|
360.0
|
|
1727
|
132.0
|
173.267
|
1728
|
220.0
|
169.933
|
1729
|
281.0
|
176.0
|
1730
|
79.0
|
179.533
|
1731
|
279.0
|
183.933
|
1732
|
220.0
|
193.2
|
1733
|
182.0
|
215.933
|
1734
|
131.0
|
199.6
|
1735
|
80.0
|
197.8
|
1736
|
221.0
|
189.133
|
1737
|
131.0
|
177.667
|
1738
|
286.0
|
193.067
|
1739
|
217.0
|
190.8
|
1740
|
420.0
|
202.8
|
1741
|
115.0
|
210.667
|
1742
|
105.0
|
223.067
|
1743
|
90.0
|
223.333
|
1744
|
109.0
|
233.933
|
1745
|
310.0
|
241.2
|
1746
|
245.0
|
229.467
|
1747
|
400.0
|
243.0
|
1748
|
300.0
|
237.0
|
1749
|
317.0
|
236.0
|
1750
|
84.0
|
254.4
|
1751
|
380.0
|
272.4
|
1752
|
240.0
|
271.8
|
1753
|
110.0
|
276.467
|
1754
|
420.0
|
269.867
|
1755
|
330.0
|
254.533
|
1756
|
100.0
|
242.8
|
1757
|
381.0
|
227.667
|
1758
|
360.0
|
234.067
|
1759
|
100.0
|
224.067
|
1760
|
380.0
|
229.667
|
1761
|
146.0
|
243.667
|
1762
|
170.0
|
221.667
|
1763
|
124.0
|
223.667
|
1764
|
90.0
|
239.0
|
1765
|
180.0
|
236.533
|
1766
|
230.0
|
219.2
|
1767
|
324.0
|
231.933
|
1768
|
320.0
|
225.333
|
1769
|
90.0
|
229.6
|
1770
|
360.0
|
234.267
|
1771
|
330.0
|
239.333
|
1772
|
344.0
|
240.667
|
1773
|
100.0
|
247.933
|
1774
|
291.0
|
248.4
|
1775
|
281.0
|
246.8
|
1776
|
210.0
|
242.133
|
1777
|
240.0
|
261.467
|
1778
|
200.0
|
261.467
|
1779
|
110.0
|
264.8
|
1780
|
289.0
|
260.533
|
1781
|
237.0
|
275.2
|
1782
|
300.0
|
283.8
|
1783
|
250.0
|
269.733
|
1784
|
380.0
|
261.067
|
1785
|
360.0
|
262.4
|
1786
|
380.0
|
255.733
|
1787
|
280.0
|
255.067
|
1788
|
320.0
|
257.8
|
1789
|
420.0
|
252.4
|
1790
|
70.0
|
242.533
|
1791
|
80.0
|
235.333
|
1792
|
260.0
|
238.0
|
1793
|
100.0
|
240.667
|
1794
|
100.0
|
224.4
|
1795
|
330.0
|
220.4
|
1796
|
156.0
|
225.733
|
1797
|
152.0
|
219.067
|
1798
|
142.0
|
241.067
|
1799
|
420.0
|
252.467
|
1800
|
400.0
|
244.467
|
1801
|
136.0
|
256.467
|
1802
|
220.0
|
277.8
|
1803
|
400.0
|
277.133
|
1804
|
320.0
|
281.4
|
1805
|
400.0
|
287.267
|
1806
|
251.0
|
297.8
|
1807
|
140.0
|
296.467
|
1808
|
280.0
|
280.467
|
1809
|
420.0
|
291.4
|
1810
|
320.0
|
282.733
|
1811
|
220.0
|
273.933
|
1812
|
240.0
|
257.933
|
1813
|
300.0
|
255.933
|
1814
|
400.0
|
256.533
|
1815
|
160.0
|
252.267
|
1816
|
300.0
|
245.6
|
1817
|
90.0
|
223.2
|
1818
|
268.0
|
208.267
|
1819
|
80.0
|
204.267
|
1820
|
370.0
|
204.933
|
1821
|
260.0
|
203.667
|
1822
|
76.0
|
202.333
|
1823
|
180.0
|
219.667
|
1824
|
84.0
|
221.533
|
1825
|
96.0
|
222.533
|
1826
|
160.0
|
210.667
|
1827
|
250.0
|
220.867
|
1828
|
281.0
|
200.867
|
1829
|
380.0
|
209.867
|
1830
|
420.0
|
216.267
|
1831
|
328.0
|
232.267
|
1832
|
105.0
|
248.667
|
1833
|
90.0
|
266.4
|
1834
|
233.0
|
280.867
|
1835
|
70.0
|
269.533
|
1836
|
395.0
|
256.8
|
1837
|
172.0
|
257.0
|
1838
|
420.0
|
255.4
|
1839
|
330.0
|
245.533
|
1840
|
362.0
|
257.2
|
1841
|
377.0
|
259.867
|
1842
|
80.0
|
256.467
|
1843
|
90.0
|
273.8
|
1844
|
383.0
|
259.467
|
1845
|
396.0
|
259.533
|
1846
|
180.0
|
251.867
|
1847
|
280.0
|
238.333
|
1848
|
130.0
|
234.467
|
1849
|
182.0
|
236.667
|
1850
|
330.0
|
245.667
|
1851
|
180.0
|
245.667
|
1852
|
173.0
|
225.467
|
1853
|
305.0
|
211.067
|
1854
|
127.0
|
220.067
|
1855
|
304.0
|
223.867
|
1856
|
410.0
|
221.2
|
1857
|
215.0
|
214.4
|
1858
|
90.0
|
216.4
|
1859
|
80.0
|
211.333
|
1860
|
180.0
|
227.8
|
1861
|
315.0
|
234.933
|
1862
|
337.0
|
235.267
|
1863
|
90.0
|
226.867
|
1864
|
80.0
|
227.533
|
1865
|
360.0
|
220.933
|
1866
|
104.0
|
220.933
|
1867
|
420.0
|
221.467
|
1868
|
412.0
|
232.133
|
1869
|
132.0
|
238.6
|
1870
|
178.0
|
244.133
|
1871
|
420.0
|
242.933
|
1872
|
116.0
|
246.933
|
1873
|
90.0
|
231.267
|
1874
|
88.0
|
252.333
|
1875
|
340.0
|
229.733
|
1876
|
412.0
|
224.733
|
1877
|
420.0
|
224.4
|
1878
|
72.0
|
223.667
|
1879
|
140.0
|
208.867
|
1880
|
125.0
|
206.067
|
1881
|
420.0
|
228.067
|
1882
|
81.0
|
244.0
|
1883
|
337.0
|
226.733
|
1884
|
127.0
|
207.667
|
1885
|
167.0
|
196.467
|
1886
|
198.0
|
219.667
|
1887
|
74.0
|
215.733
|
1888
|
420.0
|
226.2
|
1889
|
327.0
|
207.733
|
1890
|
81.0
|
214.333
|
1891
|
126.0
|
201.2
|
1892
|
252.0
|
204.933
|
1893
|
420.0
|
215.8
|
1894
|
81.0
|
214.6
|
1895
|
282.0
|
233.667
|
1896
|
143.0
|
211.8
|
1897
|
180.0
|
201.733
|
1898
|
140.0
|
205.267
|
1899
|
183.0
|
202.533
|
1900
|
330.0
|
195.0
|
1901
|
180.0
|
182.667
|
1902
|
360.0
|
189.333
|
1903
|
92.0
|
175.933
|
1904
|
176.0
|
173.733
|
1905
|
134.0
|
172.467
|
1906
|
85.0
|
171.0
|
1907
|
139.0
|
167.267
|
1908
|
235.0
|
157.467
|
1909
|
181.0
|
167.467
|
1910
|
81.0
|
170.133
|
1911
|
110.0
|
174.733
|
1912
|
161.0
|
173.0
|
1913
|
118.0
|
174.133
|
1914
|
127.0
|
176.8
|
1915
|
183.0
|
184.867
|
1916
|
330.0
|
191.2
|
1917
|
400.0
|
197.8
|
1918
|
161.0
|
198.333
|
1919
|
150.0
|
216.467
|
1920
|
151.0
|
214.133
|
1921
|
125.0
|
217.733
|
1922
|
260.0
|
235.267
|
1923
|
330.0
|
226.933
|
1924
|
280.0
|
216.6
|
1925
|
89.0
|
199.8
|
1926
|
382.0
|
198.933
|
1927
|
126.0
|
196.267
|
1928
|
172.0
|
192.2
|
1929
|
390.0
|
193.733
|
1930
|
58.0
|
187.133
|
1931
|
175.0
|
169.8
|
1932
|
148.0
|
155.2
|
1933
|
148.0
|
177.267
|
1934
|
110.0
|
176.533
|
1935
|
90.0
|
196.133
|
1936
|
148.0
|
190.267
|
1937
|
161.0
|
168.533
|
1938
|
70.0
|
171.933
|
1939
|
61.0
|
174.6
|
1940
|
420.0
|
192.733
|
1941
|
371.0
|
196.267
|
1942
|
420.0
|
193.067
|
1943
|
84.0
|
194.6
|
1944
|
64.0
|
194.667
|
1945
|
109.0
|
191.933
|
1946
|
215.0
|
197.467
|
1947
|
420.0
|
211.533
|
1948
|
201.0
|
193.667
|
1949
|
62.0
|
195.467
|
1950
|
113.0
|
178.733
|
1951
|
149.0
|
186.2
|
1952
|
120.0
|
187.933
|
1953
|
153.0
|
195.867
|
1954
|
272.0
|
185.933
|
1955
|
152.0
|
169.933
|
1956
|
398.0
|
178.467
|
1957
|
169.0
|
186.667
|
1958
|
196.0
|
193.2
|
1959
|
90.0
|
206.133
|
1960
|
228.0
|
211.733
|
1961
|
66.0
|
215.733
|
1962
|
180.0
|
213.667
|
1963
|
329.0
|
224.467
|
1964
|
185.0
|
210.333
|
1965
|
211.0
|
212.0
|
1966
|
343.0
|
205.0
|
1967
|
204.0
|
205.4
|
1968
|
213.0
|
195.2
|
1969
|
241.0
|
203.867
|
1970
|
314.0
|
205.533
|
1971
|
186.0
|
197.933
|
1972
|
194.0
|
206.867
|
1973
|
91.0
|
210.2
|
1974
|
96.0
|
201.067
|
1975
|
75.0
|
203.267
|
1976
|
196.0
|
198.067
|
1977
|
205.0
|
195.2
|
1978
|
215.0
|
198.867
|
1979
|
319.0
|
208.733
|
1980
|
261.0
|
222.933
|
1981
|
206.0
|
227.067
|
1982
|
237.0
|
224.667
|
1983
|
135.0
|
224.333
|
1984
|
198.0
|
219.667
|
1985
|
369.0
|
210.933
|
1986
|
334.0
|
203.133
|
1987
|
407.0
|
196.6
|
1988
|
153.0
|
184.267
|
1989
|
60.0
|
188.2
|
1990
|
70.0
|
181.0
|
1991
|
126.0
|
180.667
|
1992
|
74.0
|
177.933
|
1993
|
98.0
|
159.733
|
1994
|
221.0
|
146.067
|
1995
|
76.0
|
125.733
|
1996
|
265.0
|
131.067
|
1997
|
129.0
|
137.267
|
1998
|
130.0
|
144.467
|
1999
|
157.0
|
150.133
|
2000
|
96.0
|
154.533
|
2001
|
129.0
|
151.267
|
2002
|
102.0
|
143.867
|
2003
|
233.0
|
155.067
|
2004
|
153.0
|
158.0
|
2005
|
178.0
|
161.333
|
2006
|
211.0
|
164.467
|
2007
|
140.0
|
160.667
|
2008
|
49.0
|
157.667
|
2009
|
110.0
|
156.4
|
2010
|
244.0
|
155.467
|
2011
|
309.0
|
151.6
|
2012
|
179.0
|
|
2013
|
177.0
|
|
2014
|
100.0
|
|
2015
|
51.0
|
|
2016
|
110.0
|
|
2017
|
88.0
|
|
2018
|
175.0
|
|