*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000906776
1970000011
1971000033
1972000022
1973000077
1974000000
19750010910
19760010910
197700101617
1978000066
1979000033
198000101213
198100302225
198200401216
1983000044
198400201820
198500402428
198600402024
198700101617
1988000077
198900202426
199000511420
1991001922243
1992001402135
199300711927
19940061714
199500301417
19960021912
199700301417
1998001001121
1999001302235
200000502429
2001001815069
2002002512046
2003002001737
2004001102940
200500601521
200600502126
2007002213356
2008001001626
200900801826
201000111214
2011004904594
2012001270129256
201300115178194
2014002802250
2015001411108250
201600881152241
2017003450136481
2018002172190409
2019002201840
202000181047228
2021004700279749
2022003621299662
2023003003
2024002035
2025000000
Total0023961621964608