*Excludes Observations that spanned multiple years

Pre 197023
19700
19710
19720
19730
19741
19751
19762
19772
19782
19791
19800
19810
19820
19831
19842
19850
19862
19873
19880
19895
199032
19911
19920
19932
19942
19952
19963
19973
19982
19993
20001
20014
20022
20030
20041
20053
20061
20075
20087
200912
201054
201158
20128
20134
20143
20157
20169
20171
201827
20190
Total302