*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197081001082
1970300003
197110000010
1972700007
1973500005
1974500106
1975800008
197615001016
197713002015
197814007021
197914006020
198014004018
198117001018
198216005021
198316001017
198417000017
198512200014
198621004025
198725208035
198823009032
198918204024
199018608032
1991223050075
1992210046067
1993460028074
1994332036071
1995322044078
1996280049077
1997354037076
1998440032076
1999280021049
2000440032076
2001512040093
2002341049084
2003330039072
2004350016051
2005360042078
20064200610103
20076950430117
200849170860152
20096820850155
20105110520104
201177101900268
20121762901510356
2013109300860225
2014110037048
2015220025047
201624007031
2017010102
2018100001
Total15931120144703152