*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700070310
1970000000
1971000000
1972000011
1973000000
1974000000
1975000000
1976000000
1977000000
1978000000
1979000000
1980000000
1981000000
1982000011
1983000000
1984000000
1985000011
1986000000
1987000000
1988000011
1989002002
1990101002
1991002024
1992001001
1993001023
19944050110
1995101002
1996000000
1997002002
1998100001
1999001001
2000000000
2001000011
2002000000
2003000000
2004000000
200590150226
2006130140229
20072190012
2008002024
20093070010
2010100140428
20110050510
201220120216
2013104038
201440100014
2015203005
2016001012
201700100212
2018006028
2019106018
2020002057
2021000000
2022000000
2023000011
2024000000
Total541143045243