*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19822
19831
19840
19852
19861
19871
198818
19894
199022
199151
19928
199347
199412
199520
199619
199715
19984
199910
20004
20010
20024
200322
20046
20050
20061
20071
20088
20098
20104
20118
20128
201312
20141
20151
20165
20176
201810
20191
20202
202110
20224
20230
Total368