| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $30,300 | $25,456 |
| 2016 | $28,753 | $23,669 |
| 2017 | $28,903 | $23,646 |
| 2018 | $28,903 | $23,886 |
| 2019 | $28,254 | $22,515 |
| 2020 | $29,750 | $24,011 |
| 2021* | $29,750 | $23,987 |
| 2022* | $29,750 | $23,963 |
| 2023* | $29,750 | $23,939 |
| 2024* | $29,750 | $23,915 |
| 2025* | $29,750 | $23,891 |