| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $24,163 | $16,088 |
| 2016 | $25,110 | $16,343 |
| 2017 | $25,682 | $16,535 |
| 2018 | $25,682 | $16,586 |
| 2019 | $27,136 | $17,757 |
| 2020 | $27,500 | $18,121 |
| 2021* | $28,127 | $18,409 |
| 2022* | $28,768 | $18,702 |
| 2023* | $29,424 | $18,999 |
| 2024* | $30,095 | $19,301 |
| 2025* | $30,781 | $19,608 |
