US GDP per capita in gold per oz from 2011 to 1960

This would be in reverse chronological order from present day to 1960.  That is, from left to right goes back into time over 50 years.

Statistics for chart obtained from this site for population and gdp, and this site for gold prices.  Chart produced using Microsoft Works Spreadsheet.

Certain features of the chart indicate some obvious problems, wouldn't you agree?

Most recent dates to the left, oldest dates to the right... X-Axis uses only last two digits of the year for readability