Average monthly unique audience figures for newspaper Web sites grew by more than 3.6 mln in 2007, a record year for the industry and an increase of more than six percent over 2006 numbers, according to Newspaper Association of America (NAA). Monthly unique visitors to newspaper Web sites averaged 62.8 mln in Q4 2007, a record number in itself and the largest in any quarter since NAA began tracking online usage in January 2004.