*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002002
1970000000
1971000000
1972002002
1973000000
1974000000
1975002002
1976002002
1977004004
1978001001
1979002002
1980002002
1981003003
1982007018
1983003003
1984005005
1985012003
1986044008
198707100017
1988043007
19890480012
1990016120028
1991320270050
1992110230034
1993514230042
1994437500091
1995424560084
1996224680094
199710296901109
19984349300131
1999215490066
200034811000161
20014920000213
200233617000209
200336625700326
200458314700235
2005311312000236
200626915600227
200716314500209
200828712600215
200932915000182
201017826000339
201136919601269
201225611600174
201321711300132
201492010000129
2015011350046
201611750023
2017010001
Total8211152938034138