Year
|
March
|
September
|
March trend
|
September trend
|
1979
|
16.608
|
7.474
|
|
|
1980
|
16.323
|
8.082
|
|
|
1981
|
15.87
|
7.734
|
|
|
1982
|
16.411
|
7.748
|
|
|
1983
|
16.313
|
7.903
|
|
|
1984
|
15.883
|
7.375
|
|
|
1985
|
16.2
|
7.244
|
|
|
1986
|
16.177
|
7.858
|
|
|
1987
|
15.986
|
7.692
|
|
|
1988
|
16.226
|
7.694
|
|
|
1989
|
15.646
|
7.277
|
|
|
1990
|
16.081
|
6.497
|
|
|
1991
|
15.557
|
6.799
|
|
|
1992
|
15.637
|
7.752
|
|
|
1993
|
15.922
|
6.753
|
|
|
1994
|
15.75
|
7.513
|
|
|
1995
|
15.326
|
6.444
|
|
|
1996
|
15.325
|
7.88
|
|
|
1997
|
15.683
|
6.959
|
|
|
1998
|
15.753
|
6.908
|
|
|
1999
|
15.489
|
6.501
|
|
|
2000
|
15.326
|
6.667
|
|
|
2001
|
15.648
|
7.059
|
|
|
2002
|
15.448
|
6.164
|
|
|
2003
|
15.779
|
6.494
|
|
|
2004
|
15.135
|
6.235
|
|
|
2005
|
14.818
|
5.761
|
|
|
2006
|
14.577
|
6.279
|
|
|
2007
|
14.772
|
4.628
|
|
|
2008
|
15.409
|
5.223
|
|
|
2009
|
15.306
|
5.759
|
|
|
2010
|
15.395
|
5.395
|
|
|
2011
|
14.815
|
5.05
|
|
|
2012
|
15.548
|
4.055
|
|
|
2013
|
15.151
|
5.543
|
|
|
2014
|
15.08
|
5.679
|
|
|
2015
|
14.598
|
5.143
|
|
|
2016
|
14.648
|
5.024
|
|
|
2017
|
14.539
|
5.251
|
|
|
2018
|
14.523
|
5.215
|
|
|
2019
|
14.784
|
4.761
|
|
|