# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8293              55
         2001      20610             198
         2002      28495             330
         2003      32483             431
         2004      26947             400
         2005      28952             447
         2006      41708             549
         2007      33393             499
         2008      29900             519
         2009      27799             432
         2010      26497             421
         2011      24587             441
         2012      27114             453
         2013      24669             425
         2014      21670             405
         2015      22259             429
         2016      20900             440
         2017      28160             472
         2018      17479             459
         2019      12537             421
         2020       9907             397
         2021       8021             378
         2022       5829             367
         2023       3606             444
         2024       3001             503
         2025       3722             481
         2026        370             187
        TOTAL     538908           10983