2011年，我们计算了新购买力平价（简称PPP，其实质是估算1美元在不同国家可以买到多少东西 ） ， 并在2014年公开。
In 2011, new purchasing power parities (or PPPs, which essentially estimate how much $1 dollar buys in different countries) had been computed, and the data became available in 2014.