# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8237              55
         2001      20476             198
         2002      28271             330
         2003      32212             431
         2004      26739             400
         2005      28710             447
         2006      41120             549
         2007      33046             499
         2008      29564             519
         2009      27418             432
         2010      26093             421
         2011      24248             441
         2012      26557             453
         2013      24124             425
         2014      21187             405
         2015      21702             429
         2016      20299             440
         2017      27181             472
         2018      16809             459
         2019      11954             421
         2020       9349             390
         2021       7586             378
         2022       5563             367
         2023       3606             441
         2024       2678             501
         2025       2227             426
        TOTAL     526956           10729