# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       5973              56
         2001      15424             199
         2002      19701             331
         2003      21543             437
         2004      16251             396
         2005      18178             482
         2006      20866             549
         2007      16234             491
         2008      14030             527
         2009      10095             431
         2010       7541             421
         2011       5077             429
         2012       2613             447
         2013        374             154
        TOTAL     173900            5350