*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970017008
1970000000
1971000000
1972005005
1973000000
1974001001
1975002002
1976001001
1977007007
1978102003
1979004004
1980007007
1981004004
1982005005
1983002002
1984005005
198502100012
198612170020
198711130015
1988007007
19890850013
199006100016
1991110270038
199231270031
1993411410359
1994421680295
19954109501110
1996310700083
199751011703135
19982199800119
199984450259
20003159601115
20016511203126
20020211600118
20038313703151
20042913501147
20053314400150
200621116401178
20078813002148
200861414100161
20097423100242
20106928500300
201141632000340
2012102041601447
2013182549701541
2014213951501576
2015242669802750
2016152187803917
201735381088061167
201829841179051297
201926511271001348
202024461508011579
202128361597041665
202226481428011503
2023439460089
20248429901150
Total3607301393304815071