*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970004004
1970000000
1971001001
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979000000
1980000000
1981001001
1982000000
1983000000
1984002002
1985000000
1986000000
1987000000
1988000000
1989000000
1990000000
1991001001
1992000000
1993000000
1994000000
1995000000
1996000000
1997000000
1998002002
1999000000
2000000000
2001000000
2002002002
2003000000
2004003003
2005002002
2006000000
2007001001
2008004004
2009001001
2010004004
2011000000
2012000000
2013001001
2014000000
2015001001
2016000000
2017003003
2018002002
2019004004
2020003003
2021005005
2022000000
2023000000
2024000000
Total00470047