*Excludes Observations that spanned multiple years

Pre 197045
19700
19710
19721
19731
19740
19751
19761
19771
19782
19790
19800
19810
19821
19830
19840
19850
19861
19871
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20032
20040
20050
20063
20070
20080
20090
20100
20112
20120
20130
20140
20150
20163
20170
20184
20190
20200
20211
20220
20230
20240
Total70