*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001034
1970000000
1971000000
1972000000
1973000011
1974000022
1975000022
1976001034
1977000033
1978000033
1979000044
1980001045
1981000044
1982000044
1983000022
1984000044
1985001056
1986000055
1987000145
1988012058
19890390921
19900280313
1991006017
199232140423
1993113130835
19940432701181
199533282752
1996158120273
199701970834
199801860630
19990070916
200006040771
20010750921
200223590450
200301020820
200403350846
200502460838
200601330925
200714080958
200805680771
20090090110
2010016180135
2011011120124
201203510945
201304170021
201405130018
2015001001
2016001001
2017001001
Total1154024632071007