*Excludes Observations that spanned multiple years

Pre 19708
19700
19711
19721
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19942
19950
19960
19970
19980
19992
20002
20011
20020
20030
20040
20051
20060
20071
20080
20090
20100
20110
20120
20130
20141
20150
20160
20171
20180
20190
20200
20210
20220
20231
20240
Total22