*Excludes Observations that spanned multiple years

Pre 197013
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19852
19860
19870
19880
19890
19900
19911
19920
19930
19941
19950
19961
19970
19980
19994
20000
20010
20023
20039
20048
20052
200622
20071
20080
20090
20101
20110
20120
20130
20140
201514
201613
20170
20180
20190
20200
20210
20220
20230
20240
Total96