Convertible Notes Convertible Notes Issue Date Security Outstanding Principal1 Maturity Date CUSIP Conversion Ratio2 Date Last Changed 4/11/2017 4.950% Senior Convertible Notes due 2022 $258,240,000 7/15/2022 74348TAR3 100.2305 4/11/2017 3/1/2019 6.375% Senior Convertible Notes due 2025 $201,250,000 3/1/2025 74348TAT9 110.7420 3/1/2019 1As of 3/31/2020 and adjusted for the 4/15/2020 repayment of the 2020 Convertible Notes as disclosed in the 3/31/2020 10-Q. 2 We do not expect any changes in the conversion ratio for any of the bonds until the dividend rate is increased to over $0.06000 per share per month.