*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19750
19761
19770
19781
19790
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19910
19920
19930
19942
19950
19963
19970
19980
19990
20000
20010
20020
20030
20040
20050
20062
20070
20080
20090
20100
20110
20123
20132
20140
20150
20161
20170
20180
20193
20202
20210
20220
20230
20240
Total26