The folks at are celebrating Tax Day with charts and graphs! Above, taxes as a percentage of gross domestic product since 1965. Some context would have been helpful here — to point out the impact of both fluctuations in GDP and changes in tax rates.

Meanwhile, they also feature charts showing that income individual taxes in the U.S. are about average as a percentage of GDP compared to other nations measured by the Organization for Economic Cooperation and Development (OECD), whereas corporate taxes are below average. Check it out. Some wonky fodder, perhaps, for the rally at the Capitol today for tax fairness.