*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197034807489
1970003036
19710220711
1972001045
19730170412
19741260615
19750260513
197602501017
197702140622
19780250411
1979051201229
198013140927
1981011101123
198203110923
198303140724
19840380718
19850350311
1986281501035
1987152921653
19880112201750
19890152601354
1990148340790
1991432400278
1992211400659
199384946013116
1994392120016231
199511878607191
199612737108164
199710102232010354
19987120191012330
199945419209259
2000560243015323
2001744273015339
200225435406416
2003115143009501
2004613448609635
20056165457012640
20061683448015562
2007294417019532
200810165326110512
2009616741505593
2010616643208612
20114170507022703
2012115638850401499
20131077012381402059
20142085812696422195
201521119116964522964
201624149022036793802
201734160424203384099
201833165923485354080
201940183524385714389
2020171825987
2021033006
Total34512078205823592833968