*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000000
1970000000
1971000000
1972000000
1973000000
1974001001
1975001001
1976001001
1977001001
1978000000
1979002002
1980000000
1981000000
1982000000
1983000000
1984000000
1985000000
1986021003
1987013004
1988000000
19891270010
1990031004
19912620010
1992062008
199351920026
199405450059
199515110053
199604200042
199711430018
199814200043
1999011002
200006250067
200116310065
200206320065
200315380062
200425170060
20051470012
2006142160059
2007235110048
200800100010
2009117009
2010112160029
2011310140027
2012030003
201301570022
201401150016
2015005005
2016032005
2017100001
Total2567115700853