*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970004004
1970000000
1971000000
1972001001
1973000000
1974001001
1975000000
1976004004
1977000000
1978000000
1979021003
1980003003
1981001001
1982011002
1983000000
1984000000
1985123006
1986014005
198701120013
1988224008
19890760013
1990010140024
19917670020
19921580014
19931460011
1994123100034
1995211140027
1996324130040
1997061110072
1998261130076
1999270160088
2000163240088
2001156130070
200201213800159
20031964300140
200401112500136
2005165310097
20060904100131
200711052500131
2008149370087
20090829300175
20100525400106
20110596700126
201201006900169
2013039310070
2014145210067
201509150024
2016000000
2017002002
Total291433786002248