# Values for Citations_by-year.txt 
#  BIN (year) Citations to Refereed Chandra Science Papers (Num. of Papers)
         2000       8253              55
         2001      20514             198
         2002      28335             330
         2003      32271             431
         2004      26801             400
         2005      28789             447
         2006      41260             549
         2007      33128             499
         2008      29660             519
         2009      27507             432
         2010      26176             421
         2011      24334             441
         2012      26683             453
         2013      24244             425
         2014      21300             405
         2015      21844             429
         2016      20443             440
         2017      27414             472
         2018      16987             459
         2019      12093             421
         2020       9499             390
         2021       7707             378
         2022       5637             367
         2023       3606             441
         2024       2745             501
         2025       2649             462
         2026          0               2
        TOTAL     529879           10767