*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19731
19741
19750
19760
19770
19781
19792
19800
19810
19822
19832
19840
19853
19860
19870
19885
19890
19902
199117
199218
199351
19943
199514
199617
199714
19980
19990
20000
20012
20020
20033
20044
20053
20062
20077
20084
20096
20102
20111
20123
20132
20144
20150
20166
201738
20188
20199
20201
20217
20227
20237
20241
Total282