| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $14,851 | $9,650 |
| 2016 | $17,804 | $12,297 |
| 2017 | $17,822 | $12,628 |
| 2018 | $17,822 | $12,322 |
| 2019 | $19,950 | $13,711 |
| 2020 | $21,450 | $15,211 |
| 2021* | $23,063 | $16,875 |
| 2022* | $24,797 | $18,721 |
| 2023* | $26,662 | $20,769 |
| 2024* | $28,667 | $23,041 |
| 2025* | $30,823 | $25,562 |