*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19801
19810
19820
19830
19840
19850
19860
19870
19880
19891
19900
19910
19920
19934
19940
19950
19960
19971
19980
19990
20000
20011
20020
20030
20040
20050
20061
20071
20080
20091
20104
20114
20121
20130
20140
20150
20160
20170
20180
20191
20200
20210
20220
20230
20240
Total23