*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197056043063
1970300306
19719008017
197250123029
1973400318
197450019125
197580110019
1976120011023
197770691234
19781101971855
19791402151692
19805701311018198
1981210658388
198241018555119
198318020768122
1984300224813113
198540036813124
1986590428899
1987481230182
19885428506120
1989241645884
1990252159014146
19912122211326184
1992240912710170
1993410321969278
19943001018814242
199526191359180
19961912113915195
1997380131959255
1998320916024225
19993011318527256
20004307423334384
20013912014319222
20022202317425244
200321099318141
200424076825124
200536077118132
20063011510737190
200735108429149
2008328711324184
2009280717947261
20101924615669292
20113314630741428
20126614122111340
20139805822925410
20146504513429273
201560024936554728
20166101352968500
20172505123116323
2018000808
Total154926114754558078984