| Year | Philly % | Pittsburgh % |
|---|---|---|
| 1790 | 0.0657 | 0 |
| 1800 | 0.0684 | 0.0026 |
| 1810 | 0.0663 | 0.0059 |
| 1820 | 0.0608 | 0.0069 |
| 1830 | 0.0597 | 0.0093 |
| 1840 | 0.0543 | 0.0122 |
| 1850 | 0.0525 | 0.0202 |
| 1860 | 0.1946 | 0.0169 |
| 1870 | 0.1914 | 0.0244 |
| 1880 | 0.1978 | 0.0365 |
| 1890 | 0.1991 | 0.0454 |
| 1900 | 0.2053 | 0.051 |
| 1910 | 0.2021 | 0.0697 |
| 1920 | 0.2091 | 0.0675 |
| 1930 | 0.2026 | 0.0695 |
| 1940 | 0.1951 | 0.0678 |
| 1950 | 0.1973 | 0.0645 |
| 1960 | 0.1769 | 0.0534 |
| 1970 | 0.1652 | 0.0441 |
| 1980 | 0.1423 | 0.0357 |
| 1990 | 0.1334 | 0.0311 |
| 2000 | 0.1236 | 0.0272 |
| 2010 | 0.1201 | 0.0241 |
| 2020 | 0.1233 | 0.0233 |
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