Year Error_24h Error_48h Error_72h 1970 84.3 185.8 253.8 1971 112.4 242.0 381.9 1972 142.3 390.6 689.2 1973 116.7 246.2 363.2 1974 97.1 206.5 348.3 1975 117.0 256.9 402.1 1976 127.9 285.2 433.0 1977 132.9 331.0 485.1 1978 144.2 323.5 423.3 1979 89.5 160.1 238.4 1980 128.6 273.2 404.8 1981 125.9 248.3 423.0 1982 131.3 244.6 271.3 1983 83.4 190.7 418.0 1984 131.7 265.3 387.4 1985 109.6 222.5 339.7 1986 107.4 237.5 383.5 1987 108.6 229.6 349.2 1988 71.6 143.0 230.8 1989 95.6 192.1 281.2 1990 100.8 194.1 301.7 1991 113.5 191.9 296.6 1992 82.9 167.8 279.9 1993 101.0 179.5 240.5 1994 102.7 209.6 341.6 1995 87.1 160.2 233.3 1996 72.0 128.1 189.8 1997 87.2 150.1 229.2 1998 83.9 144.3 201.8 1999 70.2 139.7 211.1 2000 70.6 131.8 220.7 2001 74.1 125.1 187.7 2002 66.6 122.4 177.9 2003 57.3 107.4 132.4 2004 53.7 94.4 143.0 2005 55.2 101.2 150.1 2006 48.0 96.6 147.3 2007 50.2 86.2 139.6 2008 48.0 87.5 124.7 2009 46.0 70.1 111.5 2010 49.9 80.8 123.8 2011 42.3 69.7 105.0 2012 38.5 65.7 95.2 2013 48.7 105.3 132.3 2014 36.3 63.8 95.7 2015 42.3 81.1 123.7