# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8330              55
         2001      20712             198
         2002      28685             330
         2003      32689             431
         2004      27109             400
         2005      29119             447
         2006      42049             549
         2007      33582             499
         2008      30103             519
         2009      28013             432
         2010      26722             421
         2011      24822             441
         2012      27468             453
         2013      24977             425
         2014      21952             405
         2015      22612             429
         2016      21221             440
         2017      28748             472
         2018      17933             459
         2019      12873             421
         2020      10204             397
         2021       8270             378
         2022       6083             367
         2023       3686             444
         2024       3146             503
         2025       4526             481
         2026        923             343
         2027          0               2
        TOTAL     546557           11141