YEAR    US.GDP  US.DEBT SOV.TEST
1953    0.37    0.49     0
1954    0.38    0.51     0
1955    0.40    0.55     0
1956    0.43    0.58     0
1957    0.45    0.60     0
1958    0.46    0.64     0
1959    0.49    0.69     0
1960    0.52    0.72     0
1961    0.53    0.77     1
1962    0.57    0.82     1
1963    0.60    0.88     0
1964    0.64    0.94     9
1965    0.69    1.01    14
1966    0.75    1.07    18
1967    0.81    1.15    17
1968    0.87    1.24    17
1969    0.95    1.33    19
1970    1.01    1.42    16
1971    1.08    1.56    23
1972    1.18    1.71    24
1973    1.31    1.90    17
1974    1.44    2.07    21
1975    1.55    2.26    19
1976    1.73    2.51    21
1977    1.97    2.83    24
1978    2.21    3.21    31
1979    2.50    3.60    31
1980    2.72    3.96    24
1981    3.05    4.35    21
1982    3.21    4.77    19
1983    3.42    5.34    25
1984    3.81    6.12    27
1985    4.10    7.09    10
1986    4.37    7.95     0
1987    4.61    8.67    23
1988    4.95    9.44    16
1989    5.35   10.18     7
1990    5.68   10.87     1
1991    5.86   11.35     0 
1992    6.14   11.90     0