*Excludes Observations that spanned multiple years

Pre 197011
19700
19710
19721
19731
19741
19751
19760
19770
19783
19790
19801
19810
19821
19830
19842
19855
19860
19872
19889
19892
19903
19910
19928
19933
19942
19953
19961
19973
19981
19993
20002
20011
20021
20031
20041
20054
20062
20076
20082
20092
20101
20112
20126
201311
20141
20151
20162
20171
20182
20192
20202
20210
20223
20235
20240
Total128