*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000101
1970000000
1971000000
1972000101
1973000000
1974000000
1975000000
1976001203
1977000101
1978000202
1979000112
1980000415
1981000101
1982000202
1983000000
1984100102
1985000101
1986000213
1987000325
1988000505
1989000628
1990000101
1991004318
1992000336
1993000516
1994000516
1995000606
1996000415
1997000729
1998000235
1999000606
2000000404
2001001203
200200024125
200300042446
200400032436
2005000141731
200600019322
2007002181030
200800017219
2009000111324
2010000211536
201100013417
2012001157692
201300228232
2014004413075
201500212721
2016000202
2017000000
2018000000
Total1017390207615