*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19741
19752
19760
19770
19780
19790
19802
19810
19821
19830
19841
19850
19860
19870
19880
19890
19901
19910
19921
19930
19940
19950
19960
19970
19980
19992
20001
20011
20020
20030
20040
20050
20060
20070
20080
20090
20100
20111
20121
20133
20140
20150
20160
20171
20180
20190
20202
20211
20221
20234
20240
Total27