*Excludes Observations that spanned multiple years

Pre 19702
19702
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19900
19910
19920
19931
19942
19950
19960
19972
19987
19990
20000
20010
20021
20030
20047
20050
20060
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
20181
20190
20200
20210
20221
20230
20240
Total27