*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
20025
200322
20049
20050
20061
20073
200812
200918
20108
201110
20128
201313
20143
20151
20165
20177
201818
20197
202036
202129
202229
202310
20242
Total502