*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970200002
1970000000
1971000000
1972000000
1973000101
1974000101
1975000000
1976000202
1977005207
19780083011
197900124218
1980003104
19810083314
19820046111
1983006039
19840068216
19850055111
19860079420
198700512320
198800812323
1989001028644
199000562520101
19910067467120
19920063457115
199300981989305
1994004216017219
199500291314164
1996001111610137
199700201264150
19980010682098
1999101152670
200000188313114
20010030763109
200200261343163
200310171192139
20040098111101
2005005914100
200600261212149
200700291357171
2008003218413229
2009007819359330
2010006628843397
2011001926110290
201200737817168
2013005811127196
201400736126160
20150053666125
201600306137
2017002428
2018000000
Total40113831563814679