*Excludes Observations that spanned multiple years

Pre 197037
197010
19714
19727
197313
197430
197519
197615
19776
197831
197913
198023
198120
198210
198332
198449
198520
198637
198748
198856
198960
199054
199153
199259
199361
199475
199599
1996113
1997204
1998136
1999165
2000164
2001139
2002148
2003175
2004159
2005199
2006238
2007165
2008235
2009239
2010284
2011218
2012150
2013112
2014156
2015178
201643
20170
20180
Total4561