*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701660060172
1970400408
197110000010
1972700108
1973800109
19747003010
19759003113
197614003017
197715007123
197814009023
1979190117037
198019004023
198119006025
1982220010032
198321004025
198423004027
198522003126
1986230011236
1987260017245
1988210012336
1989220018646
1990201193162
19912202283082
19922112281466
199328023447111
1994290359100191
199528182555117
199621194783161
1997311246175255
1998251742204279
1999231528148205
2000370842204291
2001371743254342
2002281278231340
2003252382342454
2004291374318425
20054103213173430
20063805234252529
20076073225221516
20084623430678457
2009540740999569
20106501448357619
201199178109926
201220715044137700
2013549241041516
2014141120134251
2015131113525175
2016130060073
20173015110
2018000000
Total160269113474032799803