*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970500005
1970100001
1971000000
1972000000
1973000000
1974100001
1975100102
1976000000
1977400004
1978300003
1979200002
1980101002
1981300003
1982500106
1983400105
1984500005
1985400206
1986100102
19874104312
19884008315
1989510309
19906000410
19911004510
19923001711
199310011012
199450114256276
199560113237257
199630013205221
199760234100142
19982001314317
199960012532
200010026325343
2001700597109
20027008218233
200350034149
20044015186196
2005700588100
2006801397109
20079029125145
2008400125369
200900010010
2010000242448
2011000141832
201210036872
201300058590
201400025254
20151006310
2016000033
2017000000
2018000000
Total15521122326523043