*Excludes Observations that spanned multiple years

Pre 197055
19700
19710
19721
19734
19741
19752
19760
19772
19780
19792
19803
19810
19821
19831
19840
19850
19861
19879
19887
19896
199015
199156
199241
19933
19948
199574
19962
199761
199843
1999184
2000756
2001531
2002111
20031459
2004670
20052017
2006603
2007581
2008537
20091628
20101175
20112243
2012985
2013628
2014631
20151125
20161479
2017420
201885
20190
Total18246