*Excludes Observations that spanned multiple years

Pre 1970113
197011
19714
19727
197313
197430
197520
197615
19776
197831
197913
198023
198120
198210
198333
198449
198520
198637
198748
198856
198960
199054
199153
199260
199365
199475
1995100
1996113
1997203
1998136
1999170
2000165
2001142
2002148
2003187
2004165
2005207
2006246
2007170
2008238
2009240
2010284
2011218
2012150
2013112
2014158
2015181
201658
20171
20180
20190
20200
20210
20220
Total4718