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*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
19901
19910
19921
19930
19940
19950
19963
19972
19980
19990
20000
20010
20020
20030
20040
20050
20061
20070
20080
20090
20108
20114
20121
20131
20142
20150
20164
20171
20183
20190
20200
20210
20220
20233
20240
Total35