*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19741
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19881
19892
19901
19911
19921
19934
19940
19950
19960
19970
19980
19990
20000
20010
20020
20031
20040
20050
20060
20071
20080
20090
20100
20111
20121
20130
20140
20150
20160
20170
20182
20192
20201
20210
20221
20230
20240
Total22