*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19730
19740
19750
19761
19770
19781
19791
19800
19810
19820
19830
19842
19852
19860
19870
19880
19890
19902
19910
19920
19930
19940
19951
19962
19970
19982
19990
20000
20013
20020
20030
20040
20052
20060
20070
20080
20090
20102
20110
20120
20132
20140
20150
20160
20170
20180
20190
20200
20211
20220
20230
20240
Total28