*Excludes Observations that spanned multiple years

Pre 19700
19701
19711
19721
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19894
199013
199115
199213
199315
19949
19951
19962
19971
19980
19992
20001
20014
20023
20032
20049
20056
20065
20074
200811
200911
201010
201112
201215
201320
20146
20154
20165
20177
20184
20190
20201
20214
20222
20235
20240
Total230