# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8325              55
         2001      20712             198
         2002      28673             330
         2003      32663             431
         2004      27098             400
         2005      29105             447
         2006      42003             549
         2007      33554             499
         2008      30078             519
         2009      27992             432
         2010      26697             421
         2011      24790             441
         2012      27424             453
         2013      24944             425
         2014      21919             405
         2015      22571             429
         2016      21188             440
         2017      28639             472
         2018      17878             459
         2019      12830             421
         2020      10174             397
         2021       8236             378
         2022       6059             367
         2023       3686             444
         2024       3126             503
         2025       4401             481
         2026        876             326
         2027          0               1
        TOTAL     545641           11123