*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19733
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19901
19910
19920
19936
19941
19951
19960
19972
19981
199910
20000
20011
20020
20031
20040
20050
20060
20070
20080
20090
201013
20119
20120
20130
20145
20152
201634
20172
201857
20190
20200
20210
20220
20230
20240
Total151