*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001089
1970000000
1971000000
1972000000
1973000011
1974000000
1975000000
1976000022
1977000022
1978000011
1979001012
1980000000
1981001001
1982002002
1983020002
1984001045
1985011013
1986102025
1987014016
1988111047
1989101013
199001250329
199102120620
1992110310547
1993020114
199403100316
19952370315
1996122139
1997103037
199802260129
1999000022
2000004059
200114020144
2002214018
200311340119
2004304007
200533130542
2006005038
20073750015
200814110016
2009114006
20103870018
20110190414
20122340716
20133480116
201406720170
20154150111
2016003014
2017001001
Total35211216289553