*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000088
1970000000
1971000000
1972000000
1973000000
1974000000
1975000011
1976000022
1977002035
1978000011
1979000022
1980000022
1981000044
1982000033
1983000011
1984000033
1985102014
1986022026
1987102047
19880260311
1989113049
19900430411
19912470316
19920270615
199321050320
1994015110834
1995191401034
199611160321
199701390830
1998211110327
1999210110831
2000116200845
2001216140840
200208230334
2003131220559
2004027160447
2005235490490
2006231240663
200707330545
2008117410463
2009045530098
201014313500179
201111517901196
201204218004226
201309461157
201401620018
201500160016
2016021003
2017000000
Total2445495511531587