Bicameralism Canadian provinces had all their upper houses abolished. In Argentina, eight provinces have bicameral legislatures, with a Senate and a Chamber of Deputies: Buenos Aires, Catamarca, Corrientes, Entre Ríos, Mendoza, Salta, San Luis (since 1987) and Santa Fe. Tucumán and Córdoba changed to unicameral systems in 1990 and 2001 respectively. In Australian states, the lower house was traditionally elected based on the one-vote-one-value principle, whereas the upper house was partially appointed and elected, with a bias towards country voters and landowners. In Queensland, the appointed upper house was abolished in 1922, while in New South Wales there were similar attempts
Catamarca Province San Francisco pass and mules were bred for the Bolivian market in the 1910s. Mining was important in the past. After becoming less active in the early 1990s, grew to now account for over 20% of the economy. Catamarca is home to one of the largest copper gold mines in the world, Bajo de la Alumbrera, which produces approximately 600,000 ounces of gold and 190,000 tonnes of copper annually. The mine employs over 1,000 people and contributes hundreds of millions of dollars in taxes and royalties to the federal and provincial governments. The agriculture of Catamarca focuses on wood (walnut),