*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002002
1970001001
1971001001
1972001001
1973001001
1974001001
1975001001
1976002002
1977001001
1978001001
1979001001
1980001001
1981000000
1982002002
1983001001
1984002002
1985013004
1986012003
1987032005
1988004004
1989043007
19900910010
19910940013
199215330057
199309040094
19940279200281
19950254300257
19960284500289
199707660082
19981255100257
199903410035
20000281600287
200118129200149
2002132561300282
20030115700122
20040264800272
200508580093
200601071800125
200711771400192
200807590084
200905110016
20100754600121
2011031360067
201203540039
201306160067
2014069240093
201502110013
2016072009
2017002002
Total343126290003450