| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,020 | $18,628 |
| 2016 | $24,580 | $19,136 |
| 2017 | $25,570 | $19,850 |
| 2018 | $25,570 | $19,519 |
| 2019 | $27,230 | $20,794 |
| 2020 | $28,000 | $21,564 |
| 2021* | $28,792 | $22,362 |
| 2022* | $29,607 | $23,189 |
| 2023* | $30,445 | $24,047 |
| 2024* | $31,307 | $24,937 |
| 2025* | $32,193 | $25,860 |
