*Excludes Observations that spanned multiple years

Pre 197016
19700
19710
19720
19730
19740
19750
19766
19773
19781
19790
19801
19812
19820
19830
19840
19850
19861
19871
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19991
20001
20010
20020
20030
20040
20050
20064
20074
20084
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20191
20200
20210
20220
20230
20240
Total46