*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197001330169203
1970004048
197100101011
19720040711
19730050813
197400100818
197502801020
197600801422
1977011101527
1978001401428
1979102201942
198000702027
1981001002333
1982001502742
1983001702138
198400902332
1985011102537
1986022102346
1987022702857
1988032602251
1989062602254
19901312712080
199123048022102
19923143612377
199324758030137
19943100121033257
199585560132156
199698368122183
1997217585135298
1998720480129321
1999514871126251
2000820476042330
2001725481140383
20022231129131394
20033342122228497
20044318130135488
20053173284044504
20065252291043591
20073221289766586
20085783842353543
2009799480086672
20101457550098719
201171093611401094
201212391308143101683
201315521678123242081
20142045177634222266
20152546248147043260
20163315273329003683
20173824377559864828
201836253811811635043
201941184284129855340
20208104885312136119
202114135101713556490
20221293920710394987
20230612107134
202400151010161
Total3653446407191201090855558