*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000101
1970000000
1971000000
1972000505
1973000000
1974000000
1975000000
1976000000
1977000707
1978000101
1979000404
1980000707
1981000303
1982000303
1983000000
1984000404
198500010212
198600113216
198700110112
1988000505
19890004711
19900008614
1991001231034
199200324128
1993204351152
1994204642191
19951048510100
199600365977
199730411210129
19980028619107
199930830445
20001038715106
2001306994112
20020001022104
20033081183132
20041021119123
20050031152120
200610214311157
20072061018117
200800510514124
20090051953203
20100062419256
201100427515294
20121041485158
20130041287139
2014001442166
201500428638
201600027330
2017000516
2018000000
Total2309826812513053