A bare 0.004 percent of the world's adult population controls nearly $30 trillion in assets, 13 percent of the world's total wealth, according to a new study released Thursday. And perhaps unsurprisingly, the study by the Swiss bank UBS and luxury industry consultant Wealth-X said the concentration of money in the hands of the ultra-rich is growing. The report said 211,275 million people qualify as "ultra-high net worth" (UHNW) - those with assets above $30 million. Of them, 2,325 have more than $1 billion.Their numbers grew 6 percent over the past year, but their wealth grew 7 percent as asset markets like stocks and property soared in many places around the world. The fastest growth, indeed, came in the "demi-billionaire" group worth a $500,000,000 to $1 billion apiece, the study said. "Even amidst geopolitical conflicts, socio-economic strife and volatile currency markets, the world's equity markets displayed strong performances, thereby enabling UHNW individuals' wealth to increase and their influence across industries and sectors to grow - from their importance in wealth management to their consumption of luxury goods," it said. "Such a large concentration of wealth in the hands of these few individuals means that they tend to have a large degree of influence, whether on global equity markets or specific industries." Of the nearly $30 trillion this elite group controls, just over one-third is in the hands of tycoons in North America, more than one-quarter in Europe and 23 percent in Asia. Of them, 87 percent are men, of the average age of 59, and nearly one-quarter of them were in banking. Of them, 68 percent were "self-made" rich, 13 percent rich by inheritance and the rest a combination of the two. The average ultra-rich woman was 57, and more likely to be involved in non-profit and social organizations (19 percent) than any other sector. Nearly half became wealthy through inheritance, while one-third were self-made wealthy. As F. Scott Fitzgerald wrote, the rich are different. The average UHNW-er spends $1 million a year on luxury goods and services.