*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19752
19760
19770
19781
19790
19801
19810
19820
19831
19840
19850
19860
19870
19881
19891
19901
19910
19920
19931
19941
19950
19960
19970
19980
19990
20002
20010
20020
20030
20040
20050
20060
20071
20083
20091
20100
20110
20120
20132
20140
20150
20161
20170
20182
20190
20200
20210
20221
20230
20240
Total25