year mo    data_type region extent   area
1979  7      Goddard      S  16.83  13.16
1980  7      Goddard      S  16.09  12.08
1981  7      Goddard      S  16.47  12.68
1982  7      Goddard      S  16.25  12.38
1983  7      Goddard      S  15.93  12.27
1984  7      Goddard      S  16.77  13.29
1985  7      Goddard      S  16.09  12.39
1986  7      Goddard      S  15.82  12.00
1987  7      Goddard      S  16.31  12.68
1988  7      Goddard      S  16.31  12.52
1989  7      Goddard      S  16.14  12.49
1990  7      Goddard      S  16.04  12.17
1991  7      Goddard      S  16.21  12.12
1992  7      Goddard      S  16.56  12.48
1993  7      Goddard      S  16.40  12.63
1994  7      Goddard      S  16.81  13.03
1995  7      Goddard      S  16.20  12.47
1996  7      Goddard      S  16.58  12.79
1997  7      Goddard      S  16.42  12.66
1998  7      Goddard      S  16.36  12.56
1999  7      Goddard      S  16.76  12.97
2000  7      Goddard      S  16.74  12.89
2001  7      Goddard      S  16.19  12.49
2002  7      Goddard      S  15.93  12.42
2003  7      Goddard      S  16.86  13.08
2004  7      Goddard      S  16.74  13.07
2005  7      Goddard      S  16.65  12.63
2006  7      Goddard      S  16.63  12.79
2007  7      Goddard      S  16.50  12.52
2008  7      Goddard      S  16.57  12.85
2009  7      Goddard      S  16.66  13.00
2010  7      Goddard      S  17.20  13.66
2011  7      NRTSI-G      S  16.28  12.19

 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.