are contributions to foreign public pension fund (EU/GER) deductable?

We are filing jointly as a married couple in the US as permanent resident.

 

Meanwhile we are still voluntarily contributing to the German public pension fund. Are these contributions deductible as they have been paid with after tax income and are comparable in nature to the US social security/old age insurance?

 

If so, how/where on my 1040?

 

Thank you!