*Excludes Observations that spanned multiple years

Pre 197013
19705
19711
19720
19731
19740
19750
19762
19771
19781
19791
19801
19810
19820
19830
19840
19850
19860
19870
19880
19895
19908
19910
19924
19936
19946
19951
19962
19973
199820
19992
20002
20018
20023
200352
200443
200531
200678
200720
2008113
2009141
201070
201128
201296
2013101
201493
201520
201621
20173
Total1006