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*Excludes Observations that spanned multiple years

Pre 19708
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19850
19860
198724
198818
19890
19906
199119
19924
19937
19941
19956
19963
19970
19980
199941
20006
20010
20022
20033
20040
200510
20060
20070
20082
20091
20109
20112
20121
201313
20148
20151
20163
20170
20180
20190
20200
20210
20220
20230
20240
Total199