*Excludes Observations that spanned multiple years

Pre 19706
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19811
19821
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19941
19950
19960
19970
19980
19992
20000
20011
20021
20030
20040
20050
20060
20070
20080
20090
20102
20110
20121
20131
20140
20151
20160
20170
20180
20190
20200
20211
20220
20233
20240
Total23