Monthly rates vary though. In the Netherlands you pay €90 or so a month for (mandatory) health insurance, with a €350 a year deductible. Low income households do get partly subsidized by the government of course.
Taxes withheld from salary, just like ainiriand mentioned. In The Netherlands (and most other European countries) you pay for insurance directly (which here includes a mandatory basic plan that can be expanded to include things like full dental) and via taxation of income.