Season 1978 PBS , 1978 Season 1979 PBS , 1979 Season 1996 PBS , 1996 Season 2009 PBS , 2009 Season 2010 PBS , 2010 Season 2011 PBS , 2011 Season 2012 PBS , 2012 Season 2013 PBS , 2013 Season 2014 PBS , 2014 Season 2015 PBS , 2015 Season 2016 PBS , 2016