*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19725
19730
19740
19750
19761
19770
19781
19790
19800
19810
19821
19831
19841
19850
19860
19870
19881
19891
19900
19912
199213
19935
19947
199561
1996113
19970
19980
19990
20000
20017
20020
200334
20040
20050
200615
200715
200818
200914
201019
201133
20120
20130
20140
20150
20160
20170
20180
20191
20200
20215
20220
20233
20241
Total381