# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8331              55
         2001      20716             198
         2002      28690             330
         2003      32694             431
         2004      27122             400
         2005      29126             447
         2006      42063             549
         2007      33592             499
         2008      30115             519
         2009      28027             432
         2010      26732             421
         2011      24832             441
         2012      27495             453
         2013      24993             425
         2014      21959             405
         2015      22634             429
         2016      21245             440
         2017      28770             472
         2018      17948             459
         2019      12888             421
         2020      10221             397
         2021       8283             378
         2022       6094             367
         2023       3687             444
         2024       3158             503
         2025       4571             481
         2026        945             356
         2027          0               2
        TOTAL     546931           11154