>Since when does Germany have a national health care system?
>Germany has health insurances, both private and public but there is not one unified system really.
Correct. Far too often, people in the US and UK think that
1) every developed country other than the US has "national health care" or "universal health care"
2) every such country does it like the UK, a monolithic system in which the government owns both the biller (single payer) and provider (hospitals)
Regarding 2), the UK system is unusual in being so monolithic. Canada has single payer but neither the national nor local government owns and operate all hospitals. Australia's system puts significant emphasis on private insurance as the alternative or preferred option to public insurance. Germany, Switzerland, Austria, and others have a variety of private and public insurance companies and hospitals, typically differentiated by income level or profession. France's system is somewhere in the middle.
Regarding 1), since Obamacare there is essentially no difference between the US's system and Germany's or Switzerland's. The US has always had a mix of public (Medicare/Medicaid, military, VA, IHS), nonprofit (Kaiser), and for-profit (Anthem) insurance providers, as well as public (military, VA, and various state- and local government-owned), nonprofit (Kaiser again, university hospitals), and for-profit (various hospital chains) deliverers. Obamacare merely mandated that the 15%[1] of Americans pre-Obamacare that did not have health insurance get it or pay a penalty. The figure is 8% now.
And before you say "Well, that's not 100%", while the penalty for Obamacare noncompliance is not high enough, 92% of Americans having health insurance is not very far from the 95-97% elsewhere. There are always people who fall between the cracks, whether a German who neglects to sign up for a new sickness fund after changing jobs, or a Canadian who neglects to sign up for a new provincial health care card after moving. The only way to get actual 100% coverage is to use the UK NHS model of having no membership card at all.
[1] Yes, 85% of Americans before Obamacare had health insurance. How many of you non-Americans (heck, many Americans) thought that "0% of Americans have healthcare" before or after Obamacare? It's OK; you're not alone in believing everything you read on Reddit.