它是国家债务的年增长额。

It's the annual increase in the national debt.

其中增长最大的领域是社交网络的图片广告，增长额约为200%。

The biggest growth area was display advertising on social networks, which grew by nearly 200%.

总计投资额占到了今年到目前为止经济增长额的88%，这样的情况也是危险的。

In total, investment accounts for 88% of economic growth so far this year.