| 1969 | 1980 | 1990 | 2000 | 2012 |
Oklahoma Nominal PCI | $3329 | $9578 | $16,177 | $24,802 | $40,620 |
U.S. Nominal PCI | $3930 | $10,150 | $19,584 | $30,587 | $43,735 |
Oklahoma/U.S. PCI Ratio | 0.847 | 0.944 | 0.826 | 0.811 | 0.929 |