*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19782
19790
19800
19810
19820
19830
19840
19851
19860
19871
19880
19890
19900
19910
19920
19931
19940
19951
19960
19970
19980
19990
20000
20010
20020
20030
20041
20051
20060
20071
20081
20092
20100
20111
20120
20134
20140
20150
20163
20171
20180
20190
20200
20210
20220
20231
20240
Total22