*Excludes Observations that spanned multiple years

Pre 197032
19705
197110
197223
197318
197436
197582
197686
197784
197882
1979105
198084
1981114
1982157
1983196
1984228
1985199
1986272
1987294
1988276
1989257
1990230
1991302
1992352
1993354
1994337
1995372
1996438
1997540
1998650
19991038
2000534
2001687
2002514
2003677
2004721
2005708
2006658
20071580
20081102
20091149
20101307
2011972
2012987
2013917
201477
20150
20161
20170
Total19844