*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002046
1970000000
1971000000
1972000000
1973000011
1974000000
1975000011
1976000011
1977000011
1978001001
1979000011
1980000000
1981000000
1982000000
1983001001
1984000000
1985011002
1986001001
1987003003
1988022004
1989104005
1990005005
199100110112
19921270010
19932360011
19941570013
19950670013
1996024006
19974380015
19982390115
19991360212
200023120118
20013340111
200213100014
2003410130128
20043680118
20051650113
200623100015
200715120018
200802110013
2009014005
2010325320060
201192200132
201257060164
20132170010
20143080011
20153170011
2016110002
2017001001
Total107102255020484