Various measures of national saving/investment compared to GDP (per capita, in international dollars), United
Kingdom, 1900 to 2000

GDP (gross domestic product) represents a nation's total income. The rest of the variables are various measures of national saving and investment, or in other words, changes in
total wealth. In order of increasing comprehensiveness, these measures include: Net investment = net fixed produced capital formation and overseas investment; Green
investment = Net investment + change in natural capital; Genuine savings = Green investment + education expenditure; GSTFP = Genuine savings + Net present value of total
factor productivity (i.e. technological change).