*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197010204750
1970000011
1971000055
1972000044
1973000033
1974030014
19750620210
19760320510
197705110622
19780250411
197901110517
1980005049
198101120518
19820070815
1983015039
1984002068
1985103059
198622120622
1987211301430
1988361101232
19891870925
199015140828
199137320648
199234220736
19931122801152
19943124601475
1995364801067
199638300950
19972103101659
19983204501381
199909270844
2000363601560
2001162201544
200202380545
2003333601052
2004072701347
2005274601469
20061578115100
2007134811770
2008016611179
20092112003126
20103512402134
20111416706178
201205118016139
2013019804103
2014008008
201501120114
2016003003
2017000000
Total49189148034042125