*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700730010
1970011002
1971061007
1972000000
1973001001
1974001001
1975011002
1976013004
1977002002
1978001001
1979000000
1980001001
1981002002
1982001001
1983000011
1984020002
1985000000
1986004004
19870280010
19880760013
1989072009
199002960035
199112450030
199232470034
199336780078
199431151700135
19954851100100
199628320188
1997379170099
199827870087
199914060047
20002114600122
20011841500100
200201002300123
200331312800162
200431922300218
200511084200151
200651544500204
200732008400287
200821736400239
20092688200152
201069011700213
20110689900167
20122734918300559
20132546126600752
20141458731200913
20153056525700852
20161161933000960
201725678340001043
201817780398001195
2019351052441001528
2020000000
2021102003
Total235723132810210749