Source: Tom Timmerman
| White | African-American | Latino | Asian | |
| 1947 | 98.36% | 1.09% | 0.55% | 0.00% |
| 1948 | 98.47% | 0.95% | 0.57% | 0.00% |
| 1949 | 96.89% | 1.75% | 1.36% | 0.00% |
| 1950 | 95.59% | 1.92% | 2.49% | 0.00% |
| 1951 | 94.39% | 2.89% | 2.71% | 0.00% |
| 1952 | 94.21% | 2.98% | 2.81% | 0.00% |
| 1953 | 92.84% | 3.95% | 3.20% | 0.00% |
| 1954 | 90.54% | 5.75% | 3.71% | 0.00% |
| 1955 | 89.46% | 5.77% | 4.78% | 0.00% |
| 1956 | 88.11% | 7.04% | 4.86% | 0.00% |
| 1957 | 87.59% | 7.31% | 5.10% | 0.00% |
| 1958 | 86.67% | 7.64% | 5.69% | 0.00% |
| 1959 | 84.62% | 9.17% | 6.22% | 0.00% |
| 1960 | 82.68% | 8.99% | 8.33% | 0.00% |
| 1961 | 83.38% | 9.88% | 6.74% | 0.00% |
| 1962 | 82.80% | 9.99% | 7.21% | 0.00% |
| 1963 | 80.33% | 11.97% | 7.70% | 0.00% |
| 1964 | 78.74% | 12.35% | 8.78% | 0.14% |
| 1965 | 79.02% | 12.40% | 8.45% | 0.14% |
| 1966 | 77.53% | 13.27% | 9.20% | 0.00% |
| 1967 | 76.74% | 13.44% | 9.82% | 0.00% |
| 1968 | 73.63% | 16.55% | 9.82% | 0.00% |
| 1969 | 73.72% | 15.16% | 11.12% | 0.00% |
| 1970 | 73.87% | 15.37% | 10.76% | 0.00% |
| 1971 | 73.13% | 16.76% | 10.10% | 0.00% |
| 1972 | 72.62% | 16.82% | 10.56% | 0.00% |
| 1973 | 71.51% | 17.53% | 10.96% | 0.00% |
| 1974 | 70.10% | 19.03% | 10.87% | 0.00% |
| 1975 | 70.76% | 20.02% | 9.10% | 0.11% |
| 1976 | 69.98% | 19.28% | 10.74% | 0.00% |
| 1977 | 71.86% | 18.17% | 9.97% | 0.00% |
| 1978 | 71.81% | 18.37% | 9.82% | 0.00% |
| 1979 | 71.11% | 19.12% | 9.77% | 0.00% |
| 1980 | 71.46% | 17.68% | 10.86% | 0.00% |
| 1981 | 70.61% | 19.16% | 10.23% | 0.00% |
| 1982 | 71.12% | 18.78% | 10.10% | 0.00% |
| 1983 | 70.48% | 18.20% | 11.32% | 0.00% |
| 1984 | 70.77% | 18.67% | 10.56% | 0.00% |
| 1985 | 71.10% | 18.66% | 10.24% | 0.00% |
| 1986 | 71.53% | 18.35% | 10.12% | 0.00% |
| 1987 | 70.96% | 18.37% | 10.67% | 0.00% |
| 1988 | 69.94% | 17.41% | 12.65% | 0.00% |
| 1989 | 71.28% | 17.12% | 11.60% | 0.00% |
| 1990 | 69.63% | 17.70% | 12.67% | 0.00% |
| 1991 | 68.86% | 17.24% | 13.90% | 0.00% |
| 1992 | 69.58% | 17.09% | 13.33% | 0.00% |
| 1993 | 68.52% | 17.66% | 13.82% | 0.00% |
| 1994 | 67.12% | 18.59% | 14.19% | 0.10% |
| 1995 | 66.21% | 17.47% | 16.17% | 0.16% |
| 1996 | 65.56% | 17.22% | 16.81% | 0.40% |
| 1997 | 62.70% | 16.68% | 20.13% | 0.49% |
| 1998 | 64.01% | 16.18% | 18.89% | 0.93% |
| 1999 | 63.76% | 14.75% | 20.24% | 1.25% |
| 2000 | 63.51% | 13.88% | 21.29% | 1.32% |
| 2001 | 63.00% | 13.26% | 22.00% | 1.73% |
| 2002 | 61.79% | 11.35% | 24.70% | 2.16% |