Population: 

80 million

Number of prostitutes:

300,000

Of which migrant:

150,000

De Jure

Prostitution:

Prostitution is legal. Pimping and promoting prostitution are illegal.

Trafficking:

There is a specific law against ‘Trafficking of women for sexual purposes’ which carries a 6 month to10 year sentence

"In 1993, the German federal law was amended to strengthen sanctions against traffickers, making them stricter than in most European countries. In the German penal code there are currently two paragraphs relating to trade in human beings, providing for sentences between six months and ten years."

De Facto

In Berlin, "While many brothels, sex clubs, massage parlours, and saunas are owned and operated by Germans, they are frequently under the financial control of foreign organised criminal groups, from Russia, Turkey, or former Yugoslavia" (European Parliament 2000)

Some claim over 75% of sex workers in Germany, Europe's most popular destination, are migrants.  Between 60% and 80% of the women trafficked into Germany come from eastern Europe, Russia or the New Independent States.

Germany's eastern borders are the focus of much activity, both in voluntary and coerced prostitution.  An example of prostitution on the Czech border is catalogued by Siden (.pdf)

German police are active against traffickers, though according to IOM, there is an extremely low incidence of actual convictions, often due to lack of evidence, and the difficulty of proving trafficking.