| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,528 | $11,514 |
| 2016 | $26,580 | $12,235 |
| 2017 | $27,360 | $14,196 |
| 2018 | $27,360 | $13,039 |
| 2019 | $29,964 | $13,701 |
| 2020 | $30,744 | $14,481 |
| 2021* | $31,645 | $15,305 |
| 2022* | $32,572 | $16,176 |
| 2023* | $33,526 | $17,096 |
| 2024* | $34,509 | $18,069 |
| 2025* | $35,520 | $19,097 |