*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19932
19940
19950
19961
19970
19980
19990
20000
20010
20020
20031
20040
20050
20060
20070
20080
20090
20102
20110
20121
20136
20140
20150
20160
201710
20189
201910
202024
20211
202213
20230
20240
Total81