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*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19910
19920
19931
19941
19950
19963
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20073
20082
20095
20101
201112
20121
20132
20143
20150
20165
20170
20182
20190
20200
20210
20220
20231
20240
Total44