Map of london tube for Let’s start with 1948. Men with less than 4 years of schooling pitched in 8.3 percent of all worked hours, whereas those with 5 to 8 years of education worked 35.6 percent. The share of the best-educated workers, with 16 or more years of schooling, was 6.0 percent. However, by 1999, men with less than 4 years of schooling worked less than 1 percent of all hours that year, and the share of those with 5 to 8 years of schooling had decreased to 3. Map of london tube 2016.