* interpolated        1940: 5.803 w +  8.00 1970: 2.1822 w
+ based on cpi        1941: 5.527 w +       1971: 2.0533 w
! projected           1942: 4.995 w +       1972: 1.9558 w
                      1943: 4.705 w +       1973: 1.8294 w
1913: 8.207 w +       1944: 4.625 w +       1974: 1.6501 w
1914: 8.098 w +       1945: 4.522 w +       1975: 1.4730 w
1915: 8.018 w +       1946: 4.166 w +  4.58 1976: 1.3906 w
1916: 7.454 w +       1947: 3.643 w +       1977: 1.2857 w
1917: 6.347 w +       1948: 3.381 w +       1978: 1.1667 w
1918: 5.404 w +                             1979: 1.0558 w
1919: 4.705 w +       1949: 3.9966 w        1980: 0.9355 w
1920: 4.062 w +  7.21 1950: 3.9341 w        1981: 0.8176 w
1921: 4.547 w +       1951: 3.6438 w        1982: 0.7534 w
1922: 4.855 w +       1952: 3.4189 w        1983: 0.6935 w
1923: 4.770 w +       1953: 3.3161 w        1984: 0.6526 w
1924: 4.761 w +       1954: 3.2162 w        1985: 0.6091 w
1925: 4.643 w +       1955: 3.2403 w        1986: 0.5784 w
1926: 4.599 w +       1956: 3.1813 w        1987: 0.5612 w
1927: 4.687 w +       1957: 3.0297 w        1988: 0.5420 w
1928: 4.751 w +       1958: 2.9775 w        1989: 0.5149 w
1929: 4.751 w +  6.16 1959: 2.8657 w        1990: 0.4846 w
1930: 4.875 w +  8.25 1960: 2.8525 w        1991: 0.4693 w
1931: 5.345 w +       1961: 2.8036 w        1992: 0.4511 w
1932: 5.959 w +       1962: 2.7266 w        1993: 0.4395 w
1933: 6.282 w +  7.98 1963: 2.6830 w        1994: 0.4230 w
1934: 6.078 w +       1964: 2.6011 w        1995: 0.4111 w
1935: 5.930 w + 10.59 1965: 2.5081 w        1996: 0.4010 w
1936: 5.873 w +       1966: 2.4153 w        1997: 0.3801 w
1937: 5.668 w +       1967: 2.3613 w        1998: 0.3596 w ~
1938: 5.776 w +  7.39 1968: 2.2830 w        1998: 0.3743 w +
1939: 5.859 w +       1969: 2.2270 w        1999: 0.3662 w +