*Excludes Observations that spanned multiple years

Pre 197086
19701
19711
19723
19732
19741
19751
19761
19771
19780
19792
19801
19810
19821
19831
19842
19850
19861
19871
19880
19891
19900
199111
19924
19932
19941
199515
19964
19975
19982
19990
20000
20010
20020
20030
20041
20051
20061
200721
200813
200912
20109
20118
20126
20137
20141
20151
20164
20173
20182
20194
20202
20211
20220
20230
Total248