*Excludes Observations that spanned multiple years

Pre 197032
19708
19712
19725
19734
19748
19756
19765
19775
19787
197913
19806
198111
198213
198325
198440
198532
198646
198767
198869
198962
199071
199182
199282
199373
199491
199589
199697
1997115
1998129
1999137
2000149
2001149
2002150
2003176
2004154
2005159
2006172
2007162
2008132
2009152
2010175
2011141
2012159
2013147
2014147
2015132
201636
20170
20181
Total3925