# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8170              55
         2001      20324             198
         2002      28030             330
         2003      31875             431
         2004      26440             400
         2005      28388             447
         2006      40502             549
         2007      32634             499
         2008      29157             519
         2009      26929             432
         2010      25605             421
         2011      23800             441
         2012      25881             453
         2013      23522             425
         2014      20624             405
         2015      20981             429
         2016      19582             440
         2017      26010             472
         2018      15902             459
         2019      11323             421
         2020       8694             390
         2021       7049             378
         2022       5233             367
         2023       3606             441
         2024       2387             501
         2025        687             211
        TOTAL     513335           10514