*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000106465
1970000011
1971000033
1972000022
1973000066
1974000000
1975000099
1976001078
197700101213
1978000066
1979000022
198000101213
198100101516
1982002079
1983000044
198400001515
198500202022
198600201921
198700101516
1988000077
198900202224
199000211417
1991001622139
1992001201830
199300711826
19940031711
199500201416
19960021811
199700201214
19980090918
1999001202032
200000501924
2001001213750
2002001811736
2003001501530
200400602733
200500401418
200600302124
2007001512440
2008001001525
200900701522
201000111113
2011003903776
2012002526996
2013004711159
201400001414
201500102324
201600201820
201700702431
20180013913
2019000000
Total00299168091124