| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,914 | $16,489 |
| 2016 | $23,502 | $16,543 |
| 2017 | $24,162 | $17,036 |
| 2018 | $24,162 | $16,528 |
| 2019 | $25,782 | $16,749 |
| 2020 | $26,262 | $17,229 |
| 2021* | $26,937 | $17,460 |
| 2022* | $27,629 | $17,694 |
| 2023* | $28,339 | $17,931 |
| 2024* | $29,068 | $18,171 |
| 2025* | $29,815 | $18,415 |