It depends on what you mean by patriotism. One is pride in a common set of national values, the other is unquestioning allegiance to the country. The latter is typical of primitive, collectivist cultures. In those cultures, any criticism of one's country or society, whether from domestic critics or foreign, is considered a direct personal affront. That is why, for example, countries like Turkey and even Japan tend to be defensive in face of criticism of their actions many generations ago.

A modern society which respects individual freedoms and does not use one person's actions to inform another person's worth has a different sense of patriotism. In this case it is allegiance to values that matters more than allegiance to a piece of land or to a set of people who happen to be born on said piece of land. Because such values may be common to many countries (eg freedom and individualism in western democracies), patriotism can blend easily with values shared across national boundaries. These societies also happen to be (not without reason) more economically advanced and more trade-friendly.

If you were to measure patriotism that is value-based as if it were patriotism that is geography-based, it would certainly appear that countries become less patriotic as they become more sophisticated.