Thanks Karen for posting that link. The ANA also has a link on their website. I printed out the study awhile back to read it at my leisure. I found this interesting tidbit on page 7 right above Chart 7:
Declines in Relative Earnings:
Salaries are likely playing a role in the declining supply of RNs. While actual earnings for RNs increased steadily from 1983 through 2000, “real” earnings -- the amount available after adjusting for inflation -- have been relatively flat since 1991. Thus, on average, RNs have seen no increase in purchasing power over the last 9 years. (See Chart 7) In contrast, the average salary for elementary school teachers has always been greater than that for RNs and is growing at a faster pace. [2] In 1983, the average elementary school teacher earned about $4,400 more than the average RN; by 2000 this had grown to the point where elementary school teachers earned about $13,600 more. [3]
It makes me pretty darn angry.

Can you believe it! I'll repeat it one more time.
In 1983, the average elementary school teacher earned about $4,400 more than the average RN; by 2000 this had grown to the point where elementary school teachers earned about $13,600 more. [3]
And they have better retirement benefits to boot!