https://biogencsr.com/wp-content/uploads/2018/06/GRI-Data-Table-BIOGEN-Biogen-2017-Corporate-Citizenship-Report.pdf https://biogencsr.com/wp-content/uploads/2018/06/GRI-INDEX-Biogen-2017-Corporate-Citizenship-Report.pdf https://biogencsr.com/wp-content/uploads/2018/06/2017-Assurance-Statement-Biogen-2017-Corporate-Citizenship-Report.pdf The 2017 Corporate Citizenship Report contains data from calendar year 2017.