*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19921
19931
19940
19950
19960
19970
19980
19991
20000
20017
20020
20030
20040
20050
20060
20070
20081
20090
20102
20113
20120
20130
20140
20150
20161
20170
20181
20191
20203
20210
20229
20230
20241
Total35