*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000011
1971000011
1972000011
1973001012
1974000000
1975000011
1976000011
1977000011
1978000011
1979001001
1980000033
1981000000
1982000011
1983001001
1984000000
1985000011
1986002035
1987010023
1988010056
1989010045
1990030047
1991001034
1992013048
1993010146
1994023038
19950150713
19960160310
19971020811
1998003058
1999002068
20000260614
20010130812
2002017008
20030650213
2004012025
2005005049
200602120317
200702180828
2008007029
20090160411
201000130316
20110090211
20120180413
20130090312
2014017019
201500110314
2016001023
2017001034
2018000033
2019002046
2020001001
2021000022
Total1301631143338