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Demographics  Population: For many countries the population is not simply defined to the number of people living within a country's borders. Several countries have substantial communities of immigrants who never will obtain citizenship. Refugees is another challenge for definitions. Israel also include settlers living in the lands internationally considered to be Palestinian territory. Figures show population in millions. Density: Here is shown simply total population divided by total surface area of one state. This is only indicative, by itself it is neutral to vital factors like percentage of arable land, water resources, mountains etc. Figures show inhabitants/km². Growth: Here is shown simply population growth as estimated through the one single year of 2009, based upon trends of the previous year. It does not reflect a longer period nor does it indicate a permanent, stable growth rate. Doubling 1900-2000: This is a figure uniquely calculated by LookLex, and shows with one basic figure the growth of a state's population through the 20th century. It is simply calculated by how many times the population figures of 1900 have doubled to reach the figures of 2000. Median age: This is a figure showing how young the population of a state is, it shows the average age of the whole population. Very low figures show imbalance with too many young, very high figures show an ageing population. The ideal figure here is half of life expectancy, which for MENA countries means about 30 to 40 years. 2050 projection: This figure is purely guessing, but based upon demographic trends: changes in fertility rates, life expectancy, average age of birth-giving mothers, median age etc. Figures show population in millions. More factors are of importance of course, but for clarity of this presentation, the data of less direct influence are instead part of the Health statistic overview: Fertility rates, Births to Deaths ratio.
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