for skyscrapers and will be opened in 0% 1% 2% 3% 4% 5% 6% 7% 8% 0-4 5-9 10-14 15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 85+ OECD population distribution development by age group, % of total share of population in age group Share of over-60-year-olds 2000: 18% 2050: 31% Source: OECD (Organization for Economic Co-Operation and Development) Demographic and Labour Force database 22 Aging populAtion the global demographic structure is changing and populations are aging.