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*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19822
19830
19840
19850
19860
19870
19885
19890
19900
19911
19922
19930
199410
19950
19963
19972
19980
19990
20000
20010
20020
20030
20044
20052
20060
20072
20084
20095
20101
20113
20126
201317
20143
20150
20160
20170
20182
20190
20200
20210
20222
20230
20240
Total76