Economic activity in the state is closely tied to trends at the national level. This includes the declining contribution to GDP of the agricultural sector and an increase in manufacturing and commerce/services. The city of Querétaro is by far the most important economic center in the state, followed by San Juan del Río. Not only is Querétero the population center of the state, it has high-quality soil for irrigation farming and cattle. It is directly connected by highway to Mexico City, the country’s largest market, as well as the north of the country and the United States. This makes the city an almost obligatory stop for most people and goods traveling north and south. This geographical advantage has spurred industrial development in the state, especially since the 1970s. Another advantage the state has is its stable social and political situation. It has a low crime rate and also noted by NGO Transparencia Mexicana as having the lowest levels of corruption among all of Mexico’s states. Of the three main sectors of the economy: agriculture, mining/industry and commerce/services, the percentage each employs and contributes to the GDP varies significantly from municipality to municipality, with agriculture making up a higher percentage of local employment and GDP in rural municipalities than in the Querétaro metropolitan area. However, overall, the state has one of the country’s strongest economies. Government authorities report an increase of 4,602 jobs in the state for January 2011, accounting for a quarter of the gain for the country. Some related to Bombardier.