*Excludes Observations that spanned multiple years

Pre 197013
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19903
19910
19921
19933
19940
19951
19969
19970
19980
19990
20000
20010
20021
20031
20041
20050
20060
20070
20080
20090
20100
20111
20121
20130
20140
20150
20161
20170
20181
20190
20200
20210
20221
20230
20240
Total39