... three years (19 81, 19 91 and 20 01) By contrast, insurance was the smallest cost in each year In 19 81, 40% of the school’s budget went on teachers’ salaries This figure rose to 50% in 19 91, but fell ... years of schooling in 19 80 to nearly 11 years in 19 90 From 19 80 to 19 90, the number of scientists and technicians in industrialised countries almost doubled to about 70 per 10 00 people Spending ... 2 011 The pie chart compares the numbers of bedrooms in these one-person households Living alone in England by age and gender, 2 011 Number of bedrooms in one-person households (England, 2 011 )...