*Excludes Observations that spanned multiple years

Pre 19708
19700
19712
19720
19730
19740
19751
19760
19774
19785
19792
19800
19810
19822
19834
19844
198514
198664
198742
198854
198924
199049
1991168
1992178
1993157
199490
1995204
199633
199735
199849
1999102
200052
2001107
200244
200326
2004118
200534
200674
2007137
200876
200972
2010120
201161
201288
201371
201470
201576
201669
201773
201860
201942
202019
202138
202259
202329
20241
Total2911