*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970413008
1970000000
1971000000
1972000000
1973000000
1974000000
1975002002
1976000000
1977000000
1978000000
1979000000
1980000000
1981001001
1982010001
1983001001
1984010001
1985010001
1986011002
1987012003
1988002002
1989022004
1990040015
19910750012
1992003003
199302210023
199408130084
199536360072
199614220045
199711450020
199807710078
199902230025
200017540080
200103240036
2002094701102
200307920081
20040132100133
200521760025
200607070077
200702350028
200801370020
2009127190047
2010018130031
2011023270050
2012144230270
20130995600155
201411514000192
201541366404208
201601435501199
201741425600202
201821396708216
2019418111203300
202003800038
202101900019
2022000011
Total2920356180212703