*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970303017
1970000000
1971000000
1972001001
1973001001
1974001012
1975000011
1976002002
1977001001
1978000000
1979001001
1980002002
1981000000
1982003014
1983002002
1984001001
1985003003
1986002002
198700120012
19880360211
1989003025
1990004004
199101100011
199210130014
199302110013
199409110020
1995111170029
199606200026
199700120012
19981770015
1999106007
2000011240035
200111160018
200209260035
200324180024
200411190223
200527150125
200602180020
200700350035
200800191020
200902240026
2010027460174
201101680069
201203170020
201304170021
201404130017
20153170011
2016011002
2017002002
Total16127530112686