Time Range	Invertebrate	Vertebrate	Primary producers
1951 – 1960	58	12	11
1961 – 1970	99	18	22
1971 – 1980	127	14	43
1981 – 1990	105	14	50
1991 – 2000	151	16	76
2000 – 2010	166	46	75
2011 – 2014	21	12	3