*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19761
19770
19781
19790
19800
19812
19820
19831
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19962
19970
19980
19991
20001
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20112
20121
20130
20140
20150
20160
20172
20182
20192
20200
20212
20224
20234
20240
Total28