*Excludes Observations that spanned multiple years

Pre 19704
19707
19710
19720
19730
19740
19750
19760
19770
19780
19791
19801
19811
19820
19830
19840
19852
19860
19870
19880
19890
19900
19910
19920
19931
19941
19951
19960
19970
19980
19990
20000
20010
20021
20030
20040
20050
20061
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20226
20235
20240
Total32