# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8394              55
         2001      20829             198
         2002      28872             330
         2003      32895             431
         2004      27314             400
         2005      29383             447
         2006      42504             549
         2007      33834             499
         2008      30382             519
         2009      28349             432
         2010      27032             421
         2011      25091             441
         2012      27882             453
         2013      25395             425
         2014      22314             405
         2015      23097             429
         2016      21700             440
         2017      29587             472
         2018      18503             459
         2019      13306             421
         2020      10593             397
         2021       8604             378
         2022       6304             367
         2023       3693             444
         2024       3378             503
         2025       5514             481
         2026       1336             392
         2027          0               3
        TOTAL     556085           11191