*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19732
19740
19750
19760
19770
19781
19790
19800
19811
19820
19832
19840
19850
19862
19874
19885
198912
19902
19911
19922
19936
19944
199513
19964
19979
19989
19995
200012
20019
20022
20034
20041
20050
20061
20078
20085
20094
201014
20118
201233
201359
201412
20151
20162
20171
20185
20197
20203
20214
20227
20236
20241
Total297