*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19851
19861
19871
19880
19892
19902
19910
19921
19935
19948
19954
19960
19971
19980
19990
20000
20010
20021
20030
20040
20052
20060
20070
20082
20090
20100
20110
20120
20130
20140
20151
20160
20171
20183
20190
20202
20213
20223
20230
20240
Total45