# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8342              55
         2001      20729             198
         2002      28720             330
         2003      32733             431
         2004      27162             400
         2005      29187             447
         2006      42164             549
         2007      33652             499
         2008      30172             519
         2009      28114             432
         2010      26809             421
         2011      24886             441
         2012      27582             453
         2013      25088             425
         2014      22034             405
         2015      22754             429
         2016      21359             440
         2017      28971             472
         2018      18088             459
         2019      13009             421
         2020      10317             397
         2021       8363             378
         2022       6155             367
         2023       3688             444
         2024       3221             503
         2025       4849             481
         2026       1040             382
         2027          0               3
        TOTAL     549188           11181