*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700084315
1970001001
1971001102
1972001001
1973000000
1974000101
1975000000
1976000000
1977000202
1978000000
1979000303
1980000202
1981001225
1982001102
1983000202
1984000000
1985000303
1986001203
1987002608
1988002406
1989001528
1990000303
199100111315
199200010010
19930039113
199400315220
199500726437
1996001020636
199700213217
199800014418
199900210012
200000214218
200100310215
200200523028
2003002231136
200400436242
200500319426
200600021122
200700021021
200800024024
2009001434149
2010001026238
201100330033
2012000101
2013000224
2014000000
2015000404
2016000505
2017000000
2018000000
Total009346256611