16. Financial liabilities

Bonds due for repayment within the next 12 months are reported under current financial liabilities.

As at 31 December 2022 and 2021, no properties were pledged to secure available credit lines. Credit lines with Swiss banks (without securities) totalled CHF 382 million (31.12.2021: CHF 382 million), of which CHF 317 million was unused as at 31 December 2022 (31.12.2021: CHF 198 million).

In 2022, the CHF 180 million bond, maturing on 3 October 2022, with a coupon of 0.75%, was repaid on redemption date.

In 2021, a CHF 115 million bond maturing on 14 February 2025 was issued on 15 February 2021. The coupon is 0.25%. The proceeds were used to refinance the CHF 140 million bond that expired on 15 February 2021, with a coupon of 0.773%. The CHF 100 million bond, maturing on 15 November 2021, with a coupon of 0.55%, was repaid on redemption date.

As at the balance sheet date, the following bonds are outstanding:

As at the balance sheet date, amounts falling due are as follows:

The interest maturity periods correspond to the above-listed maturities. The weighted average interest rate of the outstanding financial liabilities as at 31 December 2022 stands at 0.39% (31.12.2021: 0.34%).