*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000099
1970000011
1971000000
1972000000
1973000000
1974001001
1975001012
1976000011
1977003014
1978000000
1979001012
1980001023
1981000011
1982101013
1983201014
198460250031
19853140715
1986001012
1987003014
1988101024
1989002035
19903250212
199112110115
199200130215
199360210330
1994922001748
1995522301747
1996801802046
1997911501237
19981102901757
1999712602256
200040610671
2001602402151
2002712702661
2003902202960
200470200734
2005201302641
2006002602147
2007102401237
200800420749
200900550863
201001650470
201121750583
2012005201466
201300300333
201400110011
2015017019
2016215019
2017000011
Total1121678503381251