*Excludes Observations that spanned multiple years

Pre 19709
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19885
19890
19901
19912
19920
19933
19941
19950
19961
19971
19980
19991
20000
20010
20020
20030
20040
20050
20060
20070
20080
20092
20100
20110
20120
20130
20143
20150
20160
20171
20181
20190
20201
20210
20220
20230
20240
Total32