| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,659 | $12,239 |
| 2016 | $18,000 | $12,565 |
| 2017 | $18,249 | $12,938 |
| 2018 | $18,249 | $13,396 |
| 2019 | $21,296 | $15,486 |
| 2020 | $22,132 | $16,322 |
| 2021* | $22,559 | $16,900 |
| 2022* | $22,995 | $17,498 |
| 2023* | $23,438 | $18,117 |
| 2024* | $23,891 | $18,759 |
| 2025* | $24,352 | $19,423 |
