*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000516
1970000303
1971000000
1972000101
1973000202
1974000000
1975000303
1976000303
1977000303
1978000101
1979000404
1980001304
1981000213
1982000639
1983000101
1984000404
1985001203
1986000538
198700110213
1988000707
198900117523
1990003104255
1991003142037
1992003181536
199300214118134
199400347221271
199500328183214
199600818278304
199700531516552
199800326449478
199900321327351
200000842555605
200100935858902
200200064575639
20030025811831243
20040045212601316
200500281722805
2006008126618752
2007001150616767
2008004162766932
2009005194380579
2010001355395751
2011001347140488
2012001122381504
201300699441546
201400167289357
2015001653399
2016000132740
2017000000
2018000000
Total009423411142313858