*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197001303135
1970004026
1971001078
1972001067
1973003025
1974002024
19750040610
1976004048
19770050712
1978002057
19790020810
19800030811
19810020810
19820060915
19830020911
19840060814
198500301316
1986221001125
198702230934
1988002701441
1989023001547
1990022611342
1991212160939
199248423113125
1993352678019626
1994018701741182063
1995318551542182032
1996226911071132814
1997054263117623
199831202141171237
1999019815112226
200011783711231879
2001085534126916
20020979411131034
2003252943010584
200411100290191149
2005021447017278
2006028251119353
20074972910191086
20081710126015852
2009013713908284
2010245031909780
20112335244010591
2012044487225558
2013113646801606
201405117701229
201504360242
201601960025
2017043007
2018061007
Total331801928061555021423