Recent studies have revealed that although personal income in the United States has more than doubled in the last 50 years, people are no happier now than they were back then.
Ku tlula kwalaho, hi ku ya hi vatshila va rihanyo ra miehleketo, vo tala eUnited States va andzise rifuwo ra vona hilaha ku phindhiweke kambirhi emalembeni ya 30 lama hundzeke kambe a va tsakanga ku tlula eku sunguleni.