Germany is the second most popular migration destination in the world, after the United States. On 1 January 2005, a new immigration law came into effect. The political background to this new law was that Germany, for the first time ever, acknowledged to be an "immigration country". The practical changes to immigration procedures were relatively minor. New immigration categories, such as "highly skilled professional" and "scientist" were introduced to attract valuable professionals to the German labour market. The development within German immigration law shows that immigration of skilled employees and academics has been eased while the labour market remains closed for unskilled workers.