| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,821 | $16,835 |
| 2016 | $28,108 | $16,997 |
| 2017 | $29,393 | $17,956 |
| 2018 | $29,393 | $18,482 |
| 2019 | $30,225 | $18,025 |
| 2020 | $30,325 | $18,125 |
| 2021* | $31,183 | $18,299 |
| 2022* | $32,066 | $18,475 |
| 2023* | $32,973 | $18,652 |
| 2024* | $33,906 | $18,831 |
| 2025* | $34,866 | $19,012 |