# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8252              55
         2001      20508             198
         2002      28322             330
         2003      32261             431
         2004      26793             400
         2005      28773             447
         2006      41239             549
         2007      33114             499
         2008      29644             519
         2009      27489             432
         2010      26165             421
         2011      24322             441
         2012      26663             453
         2013      24229             425
         2014      21276             405
         2015      21840             429
         2016      20423             440
         2017      27378             472
         2018      16961             459
         2019      12067             421
         2020       9470             390
         2021       7695             378
         2022       5620             367
         2023       3606             441
         2024       2738             501
         2025       2588             447
         2026          0               1
        TOTAL     529436           10751