# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8151              55
         2001      20284             198
         2002      27954             330
         2003      31759             431
         2004      26331             400
         2005      28282             447
         2006      40283             549
         2007      32461             499
         2008      29002             519
         2009      26750             432
         2010      25415             421
         2011      23633             441
         2012      25631             453
         2013      23264             425
         2014      20411             405
         2015      20723             429
         2016      19278             440
         2017      25602             472
         2018      15579             459
         2019      11067             421
         2020       8396             390
         2021       6821             378
         2022       5112             367
         2023       3606             441
         2024       2255             500
         2025        319             127
        TOTAL     508369           10429