# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8387              55
         2001      20818             198
         2002      28863             330
         2003      32888             431
         2004      27289             400
         2005      29379             447
         2006      42460             549
         2007      33814             499
         2008      30364             519
         2009      28303             432
         2010      27000             421
         2011      25079             441
         2012      27833             453
         2013      25352             425
         2014      22273             405
         2015      23051             429
         2016      21660             440
         2017      29535             472
         2018      18449             459
         2019      13234             421
         2020      10547             397
         2021       8569             378
         2022       6288             367
         2023       3692             444
         2024       3354             503
         2025       5426             481
         2026       1366             392
         2027          0               3
        TOTAL     555273           11191