Most commonly, patients describe acute tenderness in the buttock and sciatica-like pain down the back of the thigh, calf and foot. Typical piriformis syndrome symptoms may include: 1  A dull ache in the buttock. 2  Pain down the back of the thigh, calf and foot (sciatica). 3  Pain when walking up stairs or inclines.
There are currently 10 sectors and 68 industries. Three of the 68 industries do not have companies represented in the S&P 500 Index; therefore, performance is not available for Marine, Transportation and Infrastructure, and Water Utilities.
A countryâs economy is broadly divided into three sectors: : This sector is involved with transforming natural resources into primary products. A large part of the output from this sector forms the raw materials for other industries. The major industries in this sector are agriculture, fishing, forestry and mining. : This sector creates finished products that are usable by the end consumer. The produce of the primary sector are used by the secondary sector to manufacture finished goods or as inputs for other businesses.