More Canadians are now nearing retirement than the number entering the workforce, according to new census results. This is already one cause of labour shortages, says Laurent Martell, director of the demography centre at Statistics Canada. The population now has a larger proportion of 55-64 year olds and it does of those aged 15 to 24. In 1966 there were 100 of the former for every 200 of the latter. Last year the ratio was 81 to 100.