# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8287              55
         2001      20604             198
         2002      28481             330
         2003      32458             431
         2004      26932             400
         2005      28935             447
         2006      41668             549
         2007      33365             499
         2008      29883             519
         2009      27773             432
         2010      26472             421
         2011      24564             441
         2012      27081             453
         2013      24632             425
         2014      21647             405
         2015      22215             429
         2016      20860             440
         2017      28101             472
         2018      17437             459
         2019      12501             421
         2020       9879             397
         2021       7982             378
         2022       5811             367
         2023       3606             444
         2024       2987             503
         2025       3656             481
         2026        350             170
        TOTAL     538167           10966