| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $15,500 | $7,929 |
| 2016 | $15,750 | $9,178 |
| 2017 | $16,000 | $8,165 |
| 2018 | $16,000 | $9,234 |
| 2019 | $12,100 | $5,816 |
| 2020 | $12,500 | $6,216 |
| 2021* | $12,699 | $6,644 |
| 2022* | $12,901 | $7,101 |
| 2023* | $13,106 | $7,589 |
| 2024* | $13,314 | $8,111 |
| 2025* | $13,526 | $8,669 |