*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700009514
1970000000
1971000167
1972000000
1973000101
1974000213
1975000101
1976000000
1977000202
1978000112
1979000000
1980000101
1981000202
1982000000
1983001001
1984000000
1985000000
1986000000
1987000000
1988000101
1989000101
1990000000
1991000000
1992000202
1993000101
1994000000
1995000303
1996000202
1997000404
1998000505
1999000202
2000000202
2001000505
2002000101
2003000628
200400010010
200500042024
2006000606
200700014317
2008000628
2009000606
201000013013
201100010111
2012000000
201300021012
2014000011
2015000202
2016000000
2017000000
2018000000
Total00112852181