Data set 3 contains the United Nations annual study that measures the level of happiness among its member countries. Happiness measurements are based on survey questions such as how people feel about their life (i.e., life ladder), levels of positive and negative emotion, freedom to make choices (Life choices), and aggregate indicators such as social support, life expectancy, and relative household income. These data are converted into numerical scores for each member country. Conduct principal component analysis on all the standardized numerical variables and allow for the maximum number of components. What percent of the total variability is accounted for by the first three principal components?