The infographic below is from WDC.
2001: the European Union decided to phase-out the use of individual stalls for pregnant sows (except for the first four weeks of gestation and one week before farrowing).
1st January 2003: sow stalls were banned for newly built or rebuilt holdings.
1st January 2013: all other existing pig farms to be converted to group housing systems.
Given the very lengthy timetable involved, I was appalled to read on the Humane Society International web site that it is likely 14 – Belgium, Cyprus, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Netherlands, Poland, Portugal, Slovenia, and Spain – of the 27 EU member states will not meet the 1st January 2013 deadline.