# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8301              55
         2001      20645             198
         2002      28566             330
         2003      32558             431
         2004      27008             400
         2005      29041             447
         2006      41878             549
         2007      33480             499
         2008      29986             519
         2009      27919             432
         2010      26611             421
         2011      24707             441
         2012      27307             453
         2013      24833             425
         2014      21810             405
         2015      22441             429
         2016      21063             440
         2017      28428             472
         2018      17709             459
         2019      12736             421
         2020      10077             397
         2021       8144             378
         2022       5972             367
         2023       3676             444
         2024       3066             503
         2025       4119             481
         2026        488             241
        TOTAL     542569           11037