It might be harder to compare against countries or consider as some sort of predictor - but as a measure presuming we the methods are similar over time - the tr

It might be harder to compare against countries or consider as some sort of predictor - but as a measure presuming we the methods are similar over time - the trend should be valuable. Regardless of starting point, if the measure in the US, for life-expectancy or infant mortality change, and it wasn't a measurment change, then there is something worth understanding going on in the complex system of lifestyle and healthcare in the country.