*Excludes Observations that spanned multiple years

Pre 1970214
197029
19713
19725
19732
19740
19754
19761
19772
197811
197918
198013
19814
19821
19831
19842
19851
19861
19871
19882
19891
19902
19912
19923
19935
19946
19956
19969
199710
19986
199913
20005
20015
20025
20034
20047
200515
200612
20074
2008123
2009174
2010110
2011115
2012168
2013175
2014143
201542
201618
201722
201811
201910
20206
20214
Total1556