The overall trend of the world is that people are living longer, some more so than others. The data extends back to 1960, with some starting later when data became available, ending with the most recent data set in 2009.
The major dips for some of the countries jumped out immediately. Historical data would suggest that they coincide with war, such as the Bangladesh Liberation War in the 1970s, the Iran-Iraq War in the 1980s, and the Rwanda Civil War in the 1990s. There is also a smaller dip for Iraq starting in early 2000.
It is an interesting look at life expectancy unfiltered by health determinants and markers. In the cases of conflict and other factors beyond our control, it shows us that even medicine at its best cannot overcome more powerful stressors. The question then is where will this trend take us in the future?