The increased focus on controls and audit in the period is a factor in the reduction in error rates - the error rate for the 2007-2013 programming period remains stable in the last years around 5%-7% and significantly below the rates for the 2000-2006 period. [...] The majority of the FIs set up were in the form of loans, which accounted for 53% of the funding paid out to final recipients by the end of 2014, while another 23% were in the form of guarantees. [...] Accordingly, it links the capital city which is the centre of economic activity with the fourth largest city in the country and the largest port and, therefore, is of vital importance for the development of the Bulgarian economy. [...] This took the form of the construction of the new metro line number 2, the first central section of which was opened in 2012, and the extension of the existing metro line 1. [...] The project was co-funded under Cohesion Policy and involved the replacement of existing track, the electrification of the line, the installation of safety systems at level crossings and of signalling and telecommunication equipment and the improvement of access to stations and services at Nantes and other places along the route.