# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       7952              55
         2001      19867             198
         2002      27121             330
         2003      30601             431
         2004      25358             400
         2005      26976             447
         2006      37575             549
         2007      30289             499
         2008      27163             517
         2009      25096             430
         2010      23457             421
         2011      21742             440
         2012      23381             452
         2013      21252             425
         2014      17361             404
         2015      17635             429
         2016      16337             440
         2017      20867             471
         2018      12532             459
         2019       7901             421
         2020       5546             390
         2021       3546             377
         2022       1210             366
         2023          0             435
         2024          0             119
        TOTAL     450765            9905