*Excludes Observations that spanned multiple years

Pre 197027
19700
19711
19721
19731
19740
19753
19767
19775
19788
19795
19800
19814
19822
19834
19843
19852
19861
19872
19881
19893
19902
19914
19926
19934
199410
19958
199613
19974
19985
199915
20007
200115
20026
20033
20046
20053
20064
20073
20083
20093
20105
201118
201219
20138
20143
20153
20161
20172
20188
20192
20205
20210
20222
20231
20240
Total281