(4) | On April 25, 2019, the registrant filed a Registration Statement on Form S-3 (Registration No. 333-231021) and deferred payment of the registration fee pursuant to Rules 456(b) and 457(r). On August 12, 2020, the registrant filed the 2020 Prospectus Supplement with the SEC and concurrently submitted a registration fee of $20,378, after accounting for a fee offset of $18,562 related to unsold securities under the prospectus supplement filed February 28, 2017. The total registration fee due, before accounting for the fee offset, was $38,940. The 2020 Prospectus Supplement related to the registrant’s offer and sale from time to time of shares of the registrant’s common stock, no par value per share, having an aggregate gross sales price of up to $300 million under an at-the-market program (the “2020 ATM Program”). On February 23, 2022, the registrant filed the 2022 Prospectus Supplement with the SEC and did not pay a registration fee, after accounting for a fee offset of $20,761.75 related to unsold securities under the 2020 Prospectus Supplement. The total registration fee due, before accounting for the fee offset, was $20,761.75 (the “2022 Fee”). The 2022 Prospectus Supplement related to the registrant’s offer and sale from time to time of shares of the registrant’s common stock, no par value per share, having an aggregate gross sales price of up to $300 million under an at-the-market program (the “2022 ATM Program”). Following the filing of the 2022 Prospectus Supplement, $8,309.18 remained available to offset future registration fees. As of the date of this prospectus supplement, $5,300,205.77 remains unsold under the 2022 ATM Program. Pursuant to Rule 457(p) under the Securities Act, a registration fee credit of $491.32, the amount of the 2022 Fee attributable to the unsold securities under the 2022 Prospectus Supplement, is available to offset the current registration fee. |