*Excludes Observations that spanned multiple years

Pre 197037
19700
19713
19721
19736
19740
19757
19766
19770
19783
19794
19802
19814
19825
19838
19844
198511
198610
19874
198815
19897
19908
19915
19926
199313
199411
199511
19968
199713
199815
199918
200016
200125
200220
200317
200434
200548
200648
200723
200835
200932
201038
201133
201217
201322
201423
20158
20162
20170
20180
Total686