year mo    data_type region extent   area
1979  2      Goddard      S   3.10   2.04
1980  2      Goddard      S   2.83   1.78
1981  2      Goddard      S   2.87   1.67
1982  2      Goddard      S   3.11   1.80
1983  2      Goddard      S   3.03   1.84
1984  2      Goddard      S   2.71   1.69
1985  2      Goddard      S   2.78   1.77
1986  2      Goddard      S   3.19   1.94
1987  2      Goddard      S   3.24   1.93
1988  2      Goddard      S   2.83   1.85
1989  2      Goddard      S   2.99   1.97
1990  2      Goddard      S   3.01   2.15
1991  2      Goddard      S   3.07   2.01
1992  2      Goddard      S   2.86   1.79
1993  2      Goddard      S   2.46   1.30
1994  2      Goddard      S   3.15   2.17
1995  2      Goddard      S   3.49   2.12
1996  2      Goddard      S   2.89   1.69
1997  2      Goddard      S   2.42   1.66
1998  2      Goddard      S   2.99   1.81
1999  2      Goddard      S   2.90   1.70
2000  2      Goddard      S   2.84   1.63
2001  2      Goddard      S   3.73   2.38
2002  2      Goddard      S   2.86   1.75
2003  2      Goddard      S   3.87   2.60
2004  2      Goddard      S   3.59   2.28
2005  2      Goddard      S   2.93   1.91
2006  2      Goddard      S   2.65   1.72
2007  2      Goddard      S   2.88   1.89
2008  2      Goddard      S   3.87   2.32
2009  2      Goddard      S   2.92   1.90
2010  2      Goddard      S   3.16   2.04
2011  2      NRTSI-G      S   2.47   1.80
2012  2      NRTSI-G      S   3.54   2.09

 Important Note: 

 When insufficient satellite data is available to process the area and extent
 values, the data is flagged as -9999. For more information see Processing
 Steps, Monthly Mean Ice Concentration in the documentation -
 http://nsidc.org/data/docs/noaa/g02135_seaice_index/index.html#processingstep.