# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8265              55
         2001      20540             198
         2002      28370             330
         2003      32310             431
         2004      26843             400
         2005      28827             447
         2006      41347             549
         2007      33187             499
         2008      29711             519
         2009      27568             432
         2010      26251             421
         2011      24385             441
         2012      26769             453
         2013      24327             425
         2014      21387             405
         2015      21924             429
         2016      20523             440
         2017      27557             472
         2018      17072             459
         2019      12198             421
         2020       9581             390
         2021       7756             378
         2022       5678             367
         2023       3606             441
         2024       2799             501
         2025       2898             471
         2026         68              23
        TOTAL     531747           10797