| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,264 | $14,922 |
| 2016 | $22,288 | $15,556 |
| 2017 | $23,168 | $15,983 |
| 2018 | $23,168 | $16,192 |
| 2019 | $20,672 | $13,734 |
| 2020 | $21,354 | $14,416 |
| 2021* | $22,059 | $14,811 |
| 2022* | $22,787 | $15,217 |
| 2023* | $23,539 | $15,634 |
| 2024* | $24,315 | $16,062 |
| 2025* | $25,118 | $16,502 |