*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19861
19870
19881
19890
19900
19910
19922
19931
19941
19950
19962
19971
19980
19990
20000
20010
20020
20030
20040
20050
20061
20070
20080
20091
20100
20110
20121
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total15