*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19851
19860
19870
19880
19891
199013
19912
19922
19936
19941
19950
19960
19970
19980
19992
20000
20010
20020
20030
20040
20050
20060
20071
20082
20090
20101
20110
20120
20131
20140
20150
20160
20170
20181
20190
20200
20211
20220
20230
20240
Total37