*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19872
19880
19891
19900
19910
19921
19933
19940
19952
19961
19970
19980
19993
20004
20014
20020
20030
20040
20050
20061
20071
20080
20090
20106
20112
20120
20131
20140
20151
20161
20173
20181
20191
20200
20210
20224
202315
20241
Total61