*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970017008
1970003003
1971000000
1972000000
1973000000
1974001001
1975001001
1976012003
1977004004
1978006006
1979036009
1980025007
1981004004
1982004004
1983002002
1984001001
1985003003
1986022004
1987112004
198814130018
198911180020
199022090031
19918740019
19920570012
1993114200035
1994040220062
199511071000118
1996649140069
199705721300585
199844013300438
199914472000468
200004451500460
20011329900339
200205284300571
200317533600790
200405674600613
200534746000537
2006658911800713
200734905000543
200822975800357
200923889600486
201034426500510
2011346411700584
2012479411600914
201302367800314
201401413900180
2015042190061
201601150016
2017000000
Total5486671206009927