*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19721
19736
197423
197523
197619
19773
197811
197910
19808
19816
19825
198312
198415
198514
19868
19879
19887
198910
199014
199110
199221
199337
199423
19957
19968
19979
19989
199911
200015
200117
200223
200316
200418
200527
200613
200722
200825
200921
201021
201119
201213
201323
20147
201511
20161
20170
20180
Total634