*Excludes Observations that spanned multiple years

Pre 1970137
19704
19711
19721
19732
197430
19755
19766
19774
19787
19797
198010
19818
19824
19832
19845
19854
19864
19873
19883
19892
19902
19917
19925
19937
199414
199534
199630
199742
1998119
199941
200051
200130
200271
2003124
2004156
2005223
200695
2007246
2008162
2009188
2010169
201137
2012135
2013165
201413
201521
20169
20171
Total2446