In 2007-08 there were no known males aged 20-29 over the height of 6'3" in the USA - [url=https://www.census.gov/compendia/statab/2012/tables/12s0209.pdf]U.S. Census Bureau, Statistical Abstract of the United States: 2012[/url], based off of unpublished data from  [url=http://www.cdc.gov/nchs/nhanes.htm]U.S. National Center for Health Statistics[/url].

Strangely there were quite a few aged between 30-59 (2.4% 30-39, 1% 40-49 and 0.5% 50-59.) Goes to show just how much the nutritional content of foods have changed since the 1980s. :)

P.S. And that's how you data mine! :p