*Excludes Observations that spanned multiple years

Pre 197034
19700
19710
19720
19730
19743
19750
19761
19772
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19915
19922
199322
199420
199534
199620
199765
199853
199910
20008
200118
200224
20039
200436
20056
200655
20075
20080
20095
201081
201113
20123
20135
20149
20151
201634
20172
Total585