| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,850 | $8,418 |
| 2016 | $18,600 | $9,852 |
| 2017 | $19,100 | $9,981 |
| 2018 | $19,100 | $9,333 |
| 2019 | $20,100 | $10,295 |
| 2020 | $20,600 | $10,795 |
| 2021* | $21,113 | $11,320 |
| 2022* | $21,639 | $11,870 |
| 2023* | $22,177 | $12,447 |
| 2024* | $22,730 | $13,052 |
| 2025* | $23,296 | $13,686 |
