*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970100067
1970000000
1971000000
1972000000
1973000044
1974010012
1975000022
1976010034
1977010045
1978010023
1979001045
1980000011
1981001034
1982000055
1983001012
1984000066
1985000044
1986004048
1987004059
19880030811
19890140813
19900170917
199122160424
199221150826
1993131701031
1994121901133
199542160830
199622120723
1997211101125
1998332201038
199900110920
2000021701130
2001212401340
200212290436
2003332401040
200432901024
2005231601435
2006232101137
2007102101335
200810392850
200920350542
201041470658
201111560563
2012002702249
201304130623
201400100010
2015009009
2016110013
2017003003
Total41455642297949