# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8326              55
         2001      20711             198
         2002      28672             330
         2003      32667             431
         2004      27101             400
         2005      29106             447
         2006      42012             549
         2007      33557             499
         2008      30086             519
         2009      27995             432
         2010      26706             421
         2011      24796             441
         2012      27423             453
         2013      24954             425
         2014      21926             405
         2015      22579             429
         2016      21192             440
         2017      28695             472
         2018      17892             459
         2019      12845             421
         2020      10175             397
         2021       8242             378
         2022       6065             367
         2023       3686             444
         2024       3131             503
         2025       4431             481
         2026        888             331
         2027          0               1
        TOTAL     545859           11128