| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $37,182 | $24,537 |
| 2016 | $38,476 | $25,587 |
| 2017 | $39,971 | $24,506 |
| 2018 | $39,971 | $22,395 |
| 2019 | $42,758 | $23,743 |
| 2020 | $45,632 | $26,617 |
| 2021* | $47,407 | $27,756 |
| 2022* | $49,251 | $28,944 |
| 2023* | $51,167 | $30,183 |
| 2024* | $53,157 | $31,475 |
| 2025* | $55,225 | $32,822 |