Tooth to Gum Ratio
A recent study was conducted by the National Dentistry Association of Dentists that reported that 44.6% of humans have an abnormal tooth to gum ratio when they smile. The United Kingdom topped the list with 51.7% of its residents with an abnormal ratio. America was listed as 7th with 46.1% just behind Albania and ahead of Canada.
Source: Volume 6 Issue 2 of the 2009 Edition of The NDAD Report.