# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8280              55
         2001      20591             198
         2002      28455             330
         2003      32415             431
         2004      26911             400
         2005      28915             447
         2006      41602             549
         2007      33323             499
         2008      29848             519
         2009      27723             432
         2010      26430             421
         2011      24515             441
         2012      27017             453
         2013      24562             425
         2014      21592             405
         2015      22156             429
         2016      20794             440
         2017      27997             472
         2018      17364             459
         2019      12453             421
         2020       9826             396
         2021       7947             378
         2022       5791             367
         2023       3606             444
         2024       2955             503
         2025       3488             481
         2026        278             144
        TOTAL     536834           10939