*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19811
19820
19830
19840
19850
19860
19871
19880
19890
19900
19910
19921
19933
19940
19951
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20130
20141
20150
20161
20171
20180
20190
20200
20211
20221
20231
20240
Total14