# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       4813              61
         2001      12428             222
         2002      14814             356
         2003      14827             482
         2004      11234             487
         2005       9729             509
         2006       7682             550
         2007       3734             489
         2008        883             372