*Excludes Observations that spanned multiple years

Pre 19707
19701
19711
19720
19731
19741
19750
19760
19770
19781
19792
19800
19810
19821
19832
19841
19850
19861
19870
19880
19891
19900
19911
19920
19930
19943
19952
19962
19970
19981
199938
200014
20019
2002114
20031
20041
20055
20066
200714
20084
2009901
2010118
201139
201272
20131570
2014197
2015167
2016427
20171464
20184076
20196391
20201380
2021771
20223
20233
20241
Total17815