# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8244              55
         2001      20495             198
         2002      28294             330
         2003      32239             431
         2004      26768             400
         2005      28739             447
         2006      41185             549
         2007      33078             499
         2008      29604             519
         2009      27459             432
         2010      26127             421
         2011      24278             441
         2012      26614             453
         2013      24172             425
         2014      21230             405
         2015      21762             429
         2016      20362             440
         2017      27273             472
         2018      16885             459
         2019      12002             421
         2020       9396             390
         2021       7639             378
         2022       5582             367
         2023       3606             441
         2024       2703             501
         2025       2366             435
         2026          0               1
        TOTAL     528102           10739