*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
198822
19890
19900
19916
19920
19934
19940
19953
19960
19970
19980
19992
20000
20012
20022
20030
20041
20050
20060
20070
20084
20091
20102
20115
20121
20130
20142
20150
20160
20173
20180
201912
202015
202112
202212
202334
20240
Total145