*Excludes Observations that spanned multiple years

Pre 19707
19700
19711
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19821
19830
19843
19850
19860
19870
19880
19890
19902
19912
19920
19930
19941
19950
19961
19970
19980
19992
20000
20010
20021
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20221
20230
20240
Total23