"Brazil has the highest tax-to-GDP rate in the Western Hemisphere and guess what - they're growing like crazy." Hillary Clinton, May 2008.

Data source: Google (based on World Bank data). Hoven's Index for June 2, 2010
Growth in GDP (market prices based on constant local currency) from 1990 to 2008:
Panama: 189%
Chile: 168%
Costa Rica: 154%
Peru: 121%
Argentina: 111%
Brazil: 63%
Tax revenue as percent of GDP (most recent year):
Panama: 10.7%
Chile: 18.9%
Costa Rica: 15.2%
Peru: 15.7%
Argentina: 24.5%
Brazil: 35.3%