*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970013004
1970000000
1971001001
1972000000
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979000000
1980001001
1981010001
1982000000
1983000000
1984000000
1985000000
1986000000
1987000000
1988000000
1989000000
1990011002
1991000000
1992000000
1993000000
1994001001
1995001001
1996000000
1997011002
1998002002
1999006006
2000004004
2001012003
2002016007
2003014005
2004011002
2005008008
2006051006
20070650011
2008004004
200900100010
201000120012
20110190010
201205160021
201300370037
201400390039
201500340034
201600450045
201702910093
20180511100116
201904890093
2020022004
2021000000
2022000000
Total03854700585