*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19902
19910
19923
19930
19940
19952
19960
19970
19980
19990
20002
20010
20020
20030
20040
20050
20061
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20171
20180
20190
20200
20212
20220
20230
20240
Total17