# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8267              55
         2001      20565             198
         2002      28418             330
         2003      32364             431
         2004      26876             400
         2005      28885             447
         2006      41481             549
         2007      33268             499
         2008      29796             519
         2009      27654             432
         2010      26357             421
         2011      24458             441
         2012      26927             453
         2013      24458             425
         2014      21510             405
         2015      22046             429
         2016      20693             440
         2017      27792             472
         2018      17254             459
         2019      12367             421
         2020       9723             395
         2021       7890             378
         2022       5751             367
         2023       3606             444
         2024       2881             501
         2025       3226             477
         2026        143              60
        TOTAL     534656           10848