Quality of Life
There are over thirty models for assessment of quality of life, subjective well-being, and happiness. The United Nations Human Development Index (HDI) is generally seen as the best utilitarian statistical measure of collective flourishing of individuals within a nation-state. The HDI is an annually-assigned aggregate. It cannot measure each individual’s subjective sense of well-being or quality of life.
Do you feel a sense of physical and mental well-being? Do you consider your health poor, marginal, or excellent? Are your basic needs (including esteem needs through validation) met? Do you have hope or optimism about the future? Do you feel a sense of autonomy and control? Do you believe you have opportunities and choices for growth or advancement in the present and future?
As the above variables fluctuate, your assessment of quality of life will fluctuate. Regardless of the presence, absence, or quality of mass statistics, your personal perception and self-report on any given day are the most relevant measures.