# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8275              55
         2001      20577             198
         2002      28436             330
         2003      32393             431
         2004      26894             400
         2005      28893             447
         2006      41543             549
         2007      33296             499
         2008      29819             519
         2009      27679             432
         2010      26378             421
         2011      24482             441
         2012      26977             453
         2013      24503             425
         2014      21548             405
         2015      22103             429
         2016      20737             440
         2017      27870             472
         2018      17304             459
         2019      12403             421
         2020       9776             396
         2021       7911             378
         2022       5768             367
         2023       3606             444
         2024       2907             501
         2025       3341             479
         2026        199              96
        TOTAL     535618           10887