*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
199366
19940
19951
19960
19970
19980
19990
20000
20010
20020
20030
20044
20050
20060
20071
20082
20092
20102
20110
20120
20132
20148
20150
20160
20170
20185
20190
20203
20212
20220
20230
20240
Total99