# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8220              55
         2001      20430             198
         2002      28201             330
         2003      32123             431
         2004      26675             400
         2005      28629             447
         2006      40956             549
         2007      32923             499
         2008      29451             519
         2009      27280             432
         2010      25968             421
         2011      24103             441
         2012      26364             453
         2013      23955             425
         2014      21015             405
         2015      21481             429
         2016      20098             440
         2017      26835             472
         2018      16542             459
         2019      11770             421
         2020       9175             390
         2021       7431             378
         2022       5467             367
         2023       3606             441
         2024       2609             501
         2025       1816             367
        TOTAL     523123           10670