Chosen from 243 National Geographic Magazines collected from 1984 to 2013. December: 1984, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2005, 2006, 2008, 2010, 2011. October: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2003, 2005, 2006, 2008, 2009, 2010, 2011, 2013.
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