*Excludes Observations that spanned multiple years

Pre 197025
19701
19710
19720
19730
19742
19750
19760
19771
19781
19791
19801
19810
19820
19830
19840
19850
19860
19871
19881
19890
19901
19912
19921
19930
19946
19950
19963
19971
19981
19995
20001
20010
20021
2003140
200411
2005237
200668
200733
200817
200982
201013
201124
201216
201321
201412
201518
201620
201721
20184
Total793