# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8340              55
         2001      20726             198
         2002      28714             330
         2003      32726             431
         2004      27148             400
         2005      29183             447
         2006      42155             549
         2007      33648             499
         2008      30168             519
         2009      28105             432
         2010      26808             421
         2011      24881             441
         2012      27568             453
         2013      25074             425
         2014      22028             405
         2015      22734             429
         2016      21345             440
         2017      28953             472
         2018      18075             459
         2019      12991             421
         2020      10301             397
         2021       8340             378
         2022       6145             367
         2023       3688             444
         2024       3210             503
         2025       4788             481
         2026       1024             356
         2027          0               2
        TOTAL     548866           11154