*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970133007
1970001001
1971010001
1972000000
1973001001
1974023005
1975010001
1976023005
1977002002
1978011002
1979010001
1980001001
1981001001
1982012003
1983021003
1984001001
1985024006
1986002002
1987025007
19880380011
19890560011
19902680016
199147100021
199272210030
199316300037
1994019510070
1995310570070
199629710082
1997014180032
1998012330045
199904140018
200006620068
200118280037
2002213390054
2003011400051
200402114200163
2005014450059
2006618510075
2007029480077
2008020390059
2009010340044
201013710000138
2011021460067
20120725000122
20131857400160
20144927900175
2015111110300215
2016212711500244
2017117816000339
2018117918800368
2019624620900461
2020028232000602
2021425035600610
2022329118100475
Total5322362867005156