Contiguous U.S. CEI (All Steps Combined) Winter (December-February) 1911-2019
Date Actual Percent
1911 21.32
1912 23.86
1913 17.46
1914 14.84
1915 21.44
1916 21.72
1917 26.20
1918 33.54
1919 15.94
1920 25.44
1921 16.66
1922 18.10
1923 14.34
1924 13.66
1925 11.10
1926 11.96
1927 13.50
1928 11.84
1929 27.38
1930 8.34
1931 25.88
1932 35.68
1933 23.28
1934 29.36
1935 14.94
1936 32.20
1937 34.74
1938 12.82
1939 7.60
1940 22.84
1941 15.98
1942 15.18
1943 11.80
1944 13.98
1945 7.26
1946 7.08
1947 7.70
1948 13.56
1949 36.04
1950 28.12
1951 12.02
1952 20.70
1953 16.18
1954 22.78
1955 16.10
1956 14.04
1957 19.92
1958 18.62
1959 14.74
1960 11.26
1961 17.12
1962 10.56
1963 22.42
1964 24.62
1965 13.60
1966 12.98
1967 10.40
1968 8.12
1969 17.00
1970 16.84
1971 10.92
1972 10.46
1973 17.50
1974 14.50
1975 10.62
1976 15.18
1977 31.56
1978 35.60
1979 39.90
1980 11.88
1981 29.48
1982 13.06
1983 27.10
1984 18.90
1985 16.08
1986 16.02
1987 20.76
1988 8.04
1989 10.10
1990 12.84
1991 14.42
1992 30.84
1993 21.60
1994 12.10
1995 18.04
1996 20.22
1997 17.30
1998 28.84
1999 28.72
2000 29.56
2001 12.34
2002 26.20
2003 19.88
2004 9.74
2005 24.84
2006 23.00
2007 14.92
2008 12.82
2009 14.44
2010 22.16
2011 13.60
2012 31.14
2013 15.90
2014 24.66
2015 22.36
2016 36.80
2017 37.66
2018 17.70
2019 21.36