*Excludes Observations that spanned multiple years

Pre 197012
19700
19710
19720
19730
19740
19750
19760
19770
19783
19790
19800
19810
19820
19830
19840
19850
19863
19870
19880
19890
19900
19910
19920
19930
19940
19950
19961
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20123
20138
20140
20150
20160
20170
20181
20190
20200
20211
20220
20231
20240
Total33