51.   The index measures the percentage of companies seeing conditions are improving minus the percentage seeing conditions worsening.

52.   The index measures the percentage of major manufacturing companies saying that business conditions are improving minus the percentage saying conditions are worsening.

53.   The index measures various factors such as per capita income, education and literacy rates.

54.   The index measures how risky it is to invest in a given country by measuring the premium it must pay over U.S. Treasury bills.

55.   The index measures the percentage of companies that believe business conditions are improving minus the percentage saying that conditions are worsening.

56.   The index measures where the overall U.S. economy is headed in the next three to six months.

57.   The NAPM index measures change in business activity.

58.   The industrial production index measures manufacturing, electricity and mining output.

59.   The index measures the percentage of companies saying that conditions are improving minus the percentage saying conditions are worsening.

60.   The index measures the percentage of companies seeing conditions as improving minus the percentage seeing conditions as worsening.