Year

α s ( M z 2 ) value and error

1989 [10]

0.11 ± 0.01

1992 [11]

0.1134 ± 0.0035

1995 [12]

0.118 ± 0.003

1997 [13]

0.118 ± 0.003

2000 [14]

0.1184 ± 0.0031

2006 [15]

0.1189 ± 0.0010

2008 [18]

0.1198 ± 0.0032

2009 [6]

0.1171 ± 0.0024

2012 [7]

0.1173 ± 0.0011

2013 [16]

0.1185 ± 0.0006