*Excludes Observations that spanned multiple years

Pre 1970134
19701
19711
19721
19730
19741
19751
19761
19773
19780
19793
19801
19811
19820
19831
19840
19850
19861
19874
19884
19894
19903
19919
19924
19933
19947
19953
19966
199710
19986
19995
20003
20011
20025
20034
20042
20057
20062
200711
20088
20093
20105
20112
20126
20136
20143
20152
20163
20171
20182
20196
20204
20211
20221
20230
20241
Total307