*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000101
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979001012
1980000000
1981000101
1982000101
1983000101
1984000101
1985000101
1986000101
1987000101
1988000101
1989000101
1990000000
1991000000
1992000101
1993000000
1994000235
1995000202
1996000123
1997000224
1998000167
1999000358
2000000123
2001000279
200200024850
200300023133
200400003333
2005000167
200600027072
200700028183
200800215861
200900001616
2010000178
2011000167
201200402529
201300011617
20140016114121
2015001236
2016000000
2017000000
2018000000
Total00946542597