Final answer:
The shares of personal consumption in US GDP have risen steadily since the 1980s, with a notable growth in consumption and personal disposable income from World War II onwards.
Step-by-step explanation:
The shares of personal consumption in GDP have risen steadily since the 1980s in the US. This trend can be observed since World War II, with both consumption and personal disposable income growing substantially over time. Moreover, there is a strong correlation between consumption and income, indicating that as people earn more, they also tend to spend more. The growth in nominal GDP from 1960 to 2010 further supports this increase in consumption, as higher GDP typically correlates with higher consumption levels.