# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       5897              56
         2001      15213             199
         2002      19336             331
         2003      20998             437
         2004      15795             396
         2005      17518             480
         2006      19923             547
         2007      15334             490
         2008      13102             525
         2009       9187             431
         2010       6472             419
         2011       4088             429
         2012       1505             390
        TOTAL     164368            5130