years. Calgary Police and crime Continuing on a downward trend of violent crimes since 1991, Calgary's together with Canada's crime rate has dropped. As of 2013 the national crime rate has dropped below levels since 1971. It is unknown what has caused the decline in violent crimes; however, Statistics Canada analyst Mary Allen correlates that communities with higher standards of socio-economic conditions tend to have low crime rates. Many other urban areas have experienced similar decreases in crime rates, and recent studies suggest this may primarily be due to decreased environmental levels of lead. Calgary has experienced significant percentage drops since 2011, such as a 23% drop in robberies. In 2012 Calgary's Crime Severity Index of 60.5 is below the national rating of 75. In 2013, community service groups and the Calgary Police Service banded together to form the Safe Communities Opportunity and Resource Centre (SCORCe) as a cooperative effort to improve effective services for vulnerable Calgarians. Nenshi opened the centre in a ceremony. In September 2013, the city extended the contract of Police Chief Rick Hanson until 2017. Nenshi credits his leadership as a factor for Calgary's low crime fortunes. Enterprise and financial initiatives The city created the Community Investment Fund to grant $252 million between 2012 and 2016 to renovate and construct new Calgarian public recreation and community facilities such as libraries. The fund provides funding for community groups to renovate their facilities that provide services to Calgarians. The fund is composed from major sources such as annual rebate of $42 million from the Alberta government, $4 million from GST refund, and $150 million from a fund created by urban developers for community growth. The fund was a response to address the need for access for recreational services, especially sports and physical facilities for children. Such as ice rinks and swimming pools. The fund also addresses the need for renovations for many aging facilities providing essential services for Calgarians. The city will construct four new facilities providing access for 84,000 Calgarians. Nenshi approved a pilot project in 2011 for mobile food van servers. The project debuted during the first "YYC Taste the Trucks" an annual festival in 2011. After a two-year pilot trial, the city council approved a process draft a bylaw to permit the food truck industry permanently in late 2013. The Calgary Economic Development (CED) organized a trade mission for Nenshi to showcase Calgary to meet