*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19971
19980
19990
20001
20010
20020
20031
20041
20050
20061
20071
20080
20092
20100
20111
20121
20130
20142
20150
20162
20170
201810
20191
20203
20211
202211
20232
20240
Total42