| Mean | Standard deviation | N |
World | 150,080.00 | 35,884.506 | 11 |
China | 13,225.00 | 4844.529 | 11 |
UK | 5429.91 | 1290.172 | 11 |
Japan | 7203.45 | 1203.892 | 11 |
USA | 17,276.45 | 6367.144 | 11 |