*Excludes Observations that spanned multiple years

Pre 197071
197013
197123
197216
197396
197489
1975112
197647
197727
197827
197943
198079
198145
198267
198371
198497
1985137
198658
198785
198857
1989122
1990116
199183
1992141
1993241
1994302
1995249
1996223
1997172
1998250
1999278
2000246
2001682
2002569
2003349
2004477
2005307
2006452
2007407
2008494
2009556
2010420
2011306
2012219
2013109
201416
20151
20161
20170
Total9048