*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970204006
1970001001
1971000000
1972001001
1973000000
1974000000
1975002002
1976002002
1977003003
1978002002
1979026008
1980052007
1981102003
1982002002
1983003003
1984001001
1985004004
1986005005
19870190010
1988013004
19891280011
199081570030
199119190029
19921390013
199321490025
1994147140062
1995526110042
1996834130055
199731412400168
19981792000100
199921003400136
20003714900123
200121361700155
200201354900184
200322444200288
200431934600242
2005820421100423
200661804000226
200711443400179
200851385700200
20097588700152
2010919615200357
2011011213300245
2012324913700389
2013317690089
2014019730092
2015638011100497
20161465800105
20170937000163
Total9530941655004844