| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,700 | $5,363 |
| 2016 | $20,000 | $7,893 |
| 2017 | $20,300 | $10,415 |
| 2018 | $20,300 | $9,910 |
| 2019 | $20,700 | $12,336 |
| 2020 | $20,900 | $12,536 |
| 2021* | $21,214 | $15,605 |
| 2022* | $21,532 | $19,425 |
| 2023* | $21,855 | $24,180 |
| 2024* | $22,182 | $30,099 |
| 2025* | $22,515 | $37,468 |
