1991 27.03 27.07 27.32 28.01 28.20 28.25 28.05 27.53 27.14 27.58 27.90 28.29 1992 28.38 28.53 28.66 29.02 28.98 28.30 27.51 26.91 26.65 26.42 26.42 26.44 1993 26.69 27.16 27.67 28.41 28.71 28.08 27.52 26.99 27.07 26.77 26.71 26.76 1994 26.64 26.81 27.39 28.08 28.24 28.04 27.54 27.38 27.20 27.47 27.81 27.85 1995 27.57 27.49 27.75 28.10 27.82 27.59 27.08 26.23 25.88 25.84 25.60 25.65 1996 25.69 25.89 26.67 27.35 27.55 27.29 26.85 26.64 26.27 26.27 26.29 25.95 1997 26.01 26.38 27.04 27.98 28.58 28.82 28.86 28.75 28.85 29.08 29.12 28.89 1998 28.93 28.78 28.62 28.60 28.51 27.34 26.30 25.57 25.46 25.25 25.24 24.91 1999 24.86 25.43 26.33 26.70 26.79 26.53 26.13 25.63 25.63 25.48 25.12 24.86 2000 24.78 25.21 26.30 26.95 27.07 26.94 26.63 26.37 26.20 26.02 25.92 25.68 2001 25.81 26.12 26.80 27.33 27.60 27.54 27.25 26.80 26.52 26.57 26.33 26.19 2002 26.39 26.71 27.29 27.84 28.24 28.44 28.03 27.72 27.81 27.96 28.17 27.97 2003 27.15 27.39 27.65 27.68 27.32 27.44 27.50 27.11 26.99 27.14 27.04 27.03 2004 26.81 26.98 27.40 27.89 28.00 27.86 27.78 27.62 27.53 27.44 27.36 27.34 2005 27.21 27.11 27.73 28.08 28.24 27.77 27.06 26.80 26.68 26.65 26.11 25.68 2006 25.63 26.08 26.57 27.50 27.85 27.73 27.30 27.16 27.32 27.41 27.69 27.74 2007 27.24 26.88 27.10 27.50 27.46 27.37 26.71 26.14 25.61 25.32 25.17 25.01 2008 24.86 25.08 26.07 26.83 27.09 27.04 26.99 26.72 26.47 26.37 26.25 25.74 2009 25.66 25.96 26.59 27.47 27.99 28.04 27.78 27.42 27.40 27.60 28.16 28.34 2010 28.07 28.01 28.18 28.20 27.71 27.04 26.22 25.47 25.12 25.03 25.06 25.00 2011 25.00 25.64 26.36 27.05 27.41 27.35 26.87 26.21 25.92 25.67 25.52 25.54 2012 25.67 26.08 26.67 27.32 27.61 27.75 27.54 27.32 27.10 26.98 26.86 26.34 2013 26.01 26.24 27.03 27.57 27.53 27.30 26.91 26.47 26.54 26.52 26.56 26.43 2014 26.05 26.14 27.00 27.90 28.25 27.96 27.23 26.82 27.01 27.16 27.46 27.31 2015 27.05 27.17 27.75 28.52 28.85 28.90 28.75 28.79 28.93 29.08 29.42 29.26 2016 29.11 29.01 28.90 28.72 28.23 27.69 26.82 26.28 26.14 25.98 25.94 26.10 2017 26.12 26.67 27.32 28.03 28.30 28.06 27.54 26.70 26.29 26.15 25.74 25.62 2018 25.57 25.97 26.48 27.31 27.73 27.77 27.42 26.94 27.19 27.62 27.61 27.49 2019 27.19 27.46 28.09 28.44 28.48 28.18 27.64 26.90 26.75 27.20 27.22 27.12 2020 27.15 27.12 27.76 28.18 27.66 27.39 26.99 26.26 25.89 25.46 25.28 25.44 2021 25.54 25.75 26.49 27.10 27.44 -99.99 -99.99 -99.99 -99.99 -99.99 -99.99 -99.99