*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000606571
1970000011
1971000033
1972000022
1973000066
1974000000
19750010910
1976001089
197700101415
1978000066
1979000033
198000101213
198100301922
198200401115
1983000044
198400201618
198500402327
198600401923
198700101617
1988000077
198900202325
199000411419
1991001622139
1992001301932
199300711826
19940051713
199500301417
19960021811
199700301316
199800100919
1999001302134
200000502126
2001001714159
2002002312044
2003001901635
2004001002838
200500601420
200600402125
2007001912848
2008001001626
200900801826
201000111113
2011004704087
2012001180114232
201300114173188
2014002802250
2015001391105245
201600861142229
2017003420134476
2018002132187402
2019002201840
202000181047228
2021004660277743
2022003531295649
2023003003
2024002035
Total0023421621024460