| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $25,962 | $20,112 |
| 2016 | $26,300 | $20,673 |
| 2017 | $26,773 | $20,709 |
| 2018 | $26,773 | $21,030 |
| 2019 | $27,315 | $21,407 |
| 2020 | $28,121 | $22,213 |
| 2021* | $28,627 | $22,611 |
| 2022* | $29,142 | $23,015 |
| 2023* | $29,667 | $23,427 |
| 2024* | $30,201 | $23,847 |
| 2025* | $30,745 | $24,274 |
