*Excludes Observations that spanned multiple years

Pre 197015
19700
19710
19721
19731
19740
19750
19760
19770
19780
19791
19801
19811
19822
19830
19840
19850
19863
19870
19880
19891
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20031
20041
20050
20060
20071
20080
20091
20100
20110
20123
20133
20141
20150
20160
20171
20180
20190
20200
20210
20220
20230
20240
Total38