The rate of decline has slowed significantly in recent years.

But the rate of decline has slowed, the company said.

At the current rate of decline, the field would disappear in 1,500 to 2,000 years.

Several factors determine the net rate of growth or decline.

But the rate of decline was slower than in previous months.

What is more, the rate of decline has accelerated in recent months.

But sales have since returned to their old rate of decline.

At their present rate of decline they'll probably be gone in another few hundred years.

"It will take some time to return to positive growth, but the rates of decline at least are slowing."

Worse, the rate of decline in that investment has been sharp.