*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970014005
1970000000
1971000000
1972000000
1973000011
1974000011
1975001001
1976000000
1977000000
1978000000
1979000000
1980000000
1981002002
1982001001
1983000000
1984006006
1985001001
1986000000
1987042006
1988035008
1989011002
1990090009
1991144009
19920760013
199303850144
199411301101143
199501631000173
199641471100162
199716450070
199812041002217
199907390183
20001259800268
200103731001384
200202081101220
200303651800383
200402011101213
200513690046
20061653802106
20071882412116
20081863000117
2009045430088
20104796100144
20111406400105
201214050147
2013436270067
2014051110062
2015018009
201601600016
2017000000
Total2328374721153348