| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,446 | $18,127 |
| 2016 | $25,215 | $18,113 |
| 2017 | $25,215 | $17,927 |
| 2018 | $25,215 | $17,648 |
| 2019 | $26,861 | $20,035 |
| 2020 | $28,074 | $21,248 |
| 2021* | $28,958 | $21,231 |
| 2022* | $29,871 | $21,214 |
| 2023* | $30,811 | $21,197 |
| 2024* | $31,782 | $21,180 |
| 2025* | $32,783 | $21,163 |