*Excludes Observations that spanned multiple years

Pre 197018
19700
19710
19720
19730
19740
19751
19760
19770
19786
19790
19800
19810
19823
19830
19840
19850
19860
19871
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20034
20040
20050
20061
20070
20080
20090
20100
20110
20120
20130
20140
20150
20166
20172
20180
20190
20200
20214
20221
20230
20240
Total47