In Wikipedia articles of countries a lot of statistics are given about the country at hand. For example in the Venezuela article, demographics are described in terms of ethnic groups (e.g. 51.6% are Mestizo), religion (71% catholic), and total population size and population density. There is GDP statistics, Gini-index, Human Development Index, and more.
Is there any openly available dataset with this type of data for many/all countries?
I'm of course aware that there is going to be some missing data within such a dataset.