*Excludes Observations that spanned multiple years

Pre 1970326
1970227
1971179
1972201
197370
1974110
1975114
197659
197797
1978108
197945
198040
1981134
198251
198332
198473
198565
198649
19879
1988167
1989185
1990166
1991174
1992136
1993627
1994360
1995310
1996197
1997161
1998128
1999209
2000359
2001272
2002232
2003181
2004110
2005223
2006235
2007475
2008435
2009244
2010309
2011181
2012203
2013230
2014165
2015120
2016130
201771
201875
2019104
202089
202148
202273
202338
202410
Total9421