*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000101
1978000000
1979000101
1980000101
1981100203
1982000202
1983000000
1984000000
1985100001
1986000314
1987000303
1988000213
1989000235
1990000314
1991000224
199200112114
19930017210
1994001539
19950007310
199600110617
19970019212
1998000336
1999000235
2000001348
2001000404
2002000437
20030009211
200400011213
200500071118
2006000505
2007001809
2008000819
200900018119
201000014115
201100014014
2012000101
2013000527
2014000202
2015000101
2016000011
2017000000
2018000000
Total20719159259