# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8249              55
         2001      20502             198
         2002      28306             330
         2003      32250             431
         2004      26776             400
         2005      28758             447
         2006      41211             549
         2007      33086             499
         2008      29628             519
         2009      27472             432
         2010      26148             421
         2011      24299             441
         2012      26635             453
         2013      24200             425
         2014      21245             405
         2015      21801             429
         2016      20393             440
         2017      27326             472
         2018      16929             459
         2019      12045             421
         2020       9434             390
         2021       7666             378
         2022       5598             367
         2023       3606             441
         2024       2724             501
         2025       2533             447
         2026          0               1
        TOTAL     528820           10751