# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8333              55
         2001      20718             198
         2002      28693             330
         2003      32698             431
         2004      27130             400
         2005      29146             447
         2006      42088             549
         2007      33609             499
         2008      30129             519
         2009      28047             432
         2010      26764             421
         2011      24846             441
         2012      27518             453
         2013      25028             425
         2014      21976             405
         2015      22665             429
         2016      21283             440
         2017      28851             472
         2018      17992             459
         2019      12931             421
         2020      10247             397
         2021       8305             378
         2022       6117             367
         2023       3687             444
         2024       3175             503
         2025       4667             481
         2026        979             356
         2027          0               2
        TOTAL     547622           11154