*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19810
19820
19831
19841
19850
19863
19870
19880
19890
19900
19910
19926
19930
19940
19951
19960
19971
19980
19990
20000
20017
20020
20031
20040
20050
20060
20071
20082
20093
20100
20113
20122
20138
201416
201517
201627
201730
20187
201914
202020
202119
202220
202316
20240
Total227