# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       7821              55
         2001      19587             198
         2002      26724             330
         2003      30076             431
         2004      24886             400
         2005      26463             447
         2006      36575             549
         2007      29529             499
         2008      26459             517
         2009      24277             430
         2010      22593             421
         2011      20995             440
         2012      22326             452
         2013      20191             425
         2014      16368             404
         2015      16412             429
         2016      15018             436
         2017      18859             471
         2018      11046             453
         2019       6692             421
         2020       4378             389
         2021       2602             377
         2022        666             365
         2023          0             197
        TOTAL     430543            9536