As the country marks the 20th anniversary of the Americans With Disabilities Act this week, the Obama administration and Congress are taking steps to give the disabled greater access to federal jobs and technology.

Under a new executive order from President Obama, federal agencies will step up efforts to hire 100,000 disabled employees over the next five years. Ten years ago this month, President Bill Clinton laid out the same goal in a similar order, Obama wrote in Monday's order, but "few steps were taken to implement [the order] in subsequent years."

According to a report released this week by the Equal Employment Opportunity Commission, workers with targeted disabilities -- including deafness, blindness, missing extremities, mental retardation and partial or complete paralysis -- represent less than 1 percent of the federal workforce.

I'm all for creating opportunity, but I'm a little confused about the 1 percent number. What percent of the general population is disabled to that extent? Is it more than 1 percent? It seems to me that the number should be proportionate.