*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19882
19890
19900
19910
19920
19930
19940
19955
19960
19970
19981
19990
20001
20010
20020
20032
20040
20050
20060
20070
20080
20090
20104
20110
20121
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20234
20240
Total24