*Excludes Observations that spanned multiple years

Pre 19708
19700
19710
19720
19730
19740
19751
19760
19771
19780
19791
19800
19811
19820
19834
19840
19851
19860
198724
198885
19897
199012
199122
199247
199394
199417
199532
199612
19974
19984
199935
200075
200133
200236
20039
200413
200526
200617
200720
200846
200939
20109
20118
20122
20130
20143
20154
201611
201725
201834
201942
202064
202135
202255
202385
202414
Total1117