Contiguous U.S. CEI (All Steps Combined) Spring (March-May) 1910-2019
Date Actual Percent
1910 32.72
1911 19.06
1912 22.74
1913 13.84
1914 14.96
1915 23.56
1916 16.88
1917 34.38
1918 16.76
1919 8.60
1920 23.02
1921 18.08
1922 17.56
1923 17.50
1924 28.80
1925 23.38
1926 31.84
1927 18.12
1928 13.98
1929 17.86
1930 7.64
1931 28.10
1932 9.80
1933 12.24
1934 39.06
1935 16.46
1936 14.74
1937 9.28
1938 15.26
1939 12.82
1940 19.66
1941 25.36
1942 18.96
1943 14.26
1944 13.18
1945 17.10
1946 15.46
1947 20.62
1948 15.44
1949 5.34
1950 20.68
1951 15.96
1952 12.60
1953 12.52
1954 13.56
1955 26.44
1956 17.64
1957 17.08
1958 19.08
1959 7.68
1960 22.50
1961 10.70
1962 6.70
1963 15.04
1964 17.04
1965 17.32
1966 12.90
1967 20.42
1968 7.36
1969 13.80
1970 12.16
1971 17.42
1972 15.00
1973 28.12
1974 18.26
1975 25.32
1976 8.78
1977 29.18
1978 10.46
1979 14.22
1980 16.50
1981 12.62
1982 8.06
1983 34.18
1984 22.26
1985 21.84
1986 16.86
1987 26.78
1988 15.62
1989 17.48
1990 13.48
1991 30.72
1992 26.46
1993 21.02
1994 16.06
1995 18.62
1996 25.98
1997 17.00
1998 20.60
1999 12.56
2000 26.16
2001 14.36
2002 21.86
2003 12.54
2004 32.54
2005 14.14
2006 24.56
2007 31.14
2008 14.08
2009 11.52
2010 21.26
2011 37.80
2012 45.44
2013 27.88
2014 17.86
2015 22.32
2016 22.76
2017 25.88
2018 20.58
2019 25.68