Aside from factual information like the budget allocated to cycling infrastructure, the length of the bicycle network, modal share and the number of cyclists and accident statistics, it also contains surveys asking regular cyclists for their opinion on the infrastructure, maintenance, and their perceived sense of safety. It gives citizens an overview of the city's plans for cycling and, in later renditions, changes initiated since the previous account's publication. The city of Copenhagen has since released its bicycle account biennially, greatly increasing its scope in later editions. In the municipal development plan from 1997, the city introduced a new concept of green bicycle routes, envisioned to be a coherent network of cycle routes that, to the extent possible, will be off-street routes through parks and other open green areas or, where this is not possible, to a limited extent along quiet streets with low traffic volumes. These routes are intended to be a supplement to the existing network centered around busy corridors with high volume vehicle traffic. In 2000 the city released a proposal for a network of 22 green bicycle routes with a total length of at a total estimated cost of 500 million DKK. As of 2012 around 40 km of network has been completed and the city is committed to completing the network in the coming years. The city hopes that the recreational and enhanced safety qualities of this network will attract certain groups of the population that currently use cars on trips to and from work, especially those with a 5–10 km commute. In 2001 Copenhagen formulated its first bicycle strategy with the publishing of ""Cycle policy 2002 – 2012"" as a way to prioritize cycling in city planning, signal its importance to the city, and to coordinate initiatives for improvements of cycling conditions. The city also vowed to use bicycle accounts to follow up on the goals set forth the cycle policy. Among these goals were an increase in modal share from 34% to 40%, a 50% decrease serious injuries or death, as well as targets for safety, comfort, and speed, measured in the surveys for the bicycle account. The next development of the municipal bicycle policy came with the release of the ""Cycle Track Priority Plan 2006–2016"" which states the order in which almost of new cycle tracks and cycle lanes will be established in the 10 years covered by plan. The expansion of the bicycle network are prioritized by a number of indicators: the number of cyclists, accidents, sense of safety, coherence in the network and coordination with other projects done by the city. In 2009 the estimated cost of implementing the plan amounted to DKK 400 million.