1970-1979 1980-1989 1990-1999 2000-2009 2010-2020 Karadeniz 15.1 14.8 14.7 15.5 16.3 Marmara 15.1 15.0 15.4 15.8 16.8 Ege 18.2 18.2 18.5 18.9 19.1 Akdeniz 21 21.1 21.2 21.7 22.2