*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970010001
1970000000
1971000000
1972000000
1973000000
1974000000
1975001001
1976000000
1977000000
1978000000
1979001001
1980000000
1981000000
1982001001
1983000000
1984000000
1985002002
1986016007
1987035008
1988007007
1989017008
199001130014
19913260011
199222040026
199313260039
1994064120076
199542960039
199625040056
199741970030
199814830052
19991730011
200013780046
2001246100058
200213290042
2003244140060
200416012700188
2005019190038
20061314360063
20070643700101
2008030320062
200912390042
2010123710095
201124420048
201201440018
201315130019
20140660012
201512100013
2016101002
2017000000
Total45690562001297