What is the secret of the long life of the Monaco peoples?

Monaco's most populous Quartier is Monte Carloand the most populous Ward is Larvotto/Bas Moulins. Through land reclamation, Monaco's land mass has expanded by 20 percent; in 2005, it had an area of only 1.974 km2 (0.762 sq mi). Monaco is known to be the most expensive and the wealthiest place on Earth, Vatican City excluded, due to its tax laws. In 2014, it was noted that about 30% of the population was made up of millionaires.