# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8298              55
         2001      20624             198
         2002      28515             330
         2003      32505             431
         2004      26965             400
         2005      28973             447
         2006      41758             549
         2007      33406             499
         2008      29916             519
         2009      27839             432
         2010      26532             421
         2011      24633             441
         2012      27178             453
         2013      24709             425
         2014      21709             405
         2015      22317             429
         2016      20956             440
         2017      28250             472
         2018      17552             459
         2019      12614             421
         2020       9949             397
         2021       8047             378
         2022       5912             367
         2023       3672             444
         2024       3014             503
         2025       3835             481
         2026        411             207
        TOTAL     540089           11003