Year Percent 1950 -2.894 1951 -2.43 1952 -1.442 1953 -0.383 1954 0.647 1955 1.548 1956 2.232 1957 2.642 1958 2.756 1959 2.606 1960 2.282 1961 1.921 1962 1.685 1963 1.701 1964 1.959 1965 2.317 1966 2.621 1967 2.815 1968 2.893 1969 2.857 1970 2.774 1971 2.693 1972 2.579 1973 2.389 1974 2.138 1975 1.854 1976 1.578 1977 1.374 1978 1.29 1979 1.323 1980 1.417 1981 1.512 1982 1.574 1983 1.589 1984 1.558 1985 1.501 1986 1.448 1987 1.419 1988 1.425 1989 1.462 1990 1.516 1991 1.563 1992 1.568 1993 1.507 1994 1.383 1995 1.226 1996 1.071 1997 0.949 1998 0.879 1999 0.862 2000 0.872 2001 0.881 2002 0.872 2003 0.835 2004 0.771 2005 0.694 2006 0.622 2007 0.566 2008 0.534 2009 0.524 2010 0.527 2011 0.531 2012 0.53 2013 0.525 2014 0.514 2015 0.5 2016 0.487 2017 0.475 2018 0.462 2019 0.447 2020 0.432 2021 0.416 2022 0.4 2023 0.383 2024 0.365 2025 0.348 2026 0.329 2027 0.309 2028 0.287 2029 0.262 2030 0.235 2031 0.209 2032 0.183 2033 0.157 2034 0.131 2035 0.105 2036 0.08 2037 0.056 2038 0.034 2039 0.013 2040 -0.006 2041 -0.025 2042 -0.043 2043 -0.059 2044 -0.074 2045 -0.088 2046 -0.101 2047 -0.113 2048 -0.124 2049 -0.135 2050 -0.145 2051 -0.154 2052 -0.163 2053 -0.171 2054 -0.178 2055 -0.185 2056 -0.191 2057 -0.197 2058 -0.203 2059 -0.209 2060 -0.215 2061 -0.22 2062 -0.225 2063 -0.23 2064 -0.233 2065 -0.236 2066 -0.239 2067 -0.242 2068 -0.246 2069 -0.249 2070 -0.253 2071 -0.256 2072 -0.259 2073 -0.262 2074 -0.265 2075 -0.267 2076 -0.27 2077 -0.272 2078 -0.274 2079 -0.277 2080 -0.279 2081 -0.282 2082 -0.284 2083 -0.286 2084 -0.288 2085 -0.289 2086 -0.291 2087 -0.293 2088 -0.295 2089 -0.297 2090 -0.298 2091 -0.3 2092 -0.302 2093 -0.304 2094 -0.306 2095 -0.308 2096 -0.309 2097 -0.311 2098 -0.313 2099 -0.315