Estimated Bitcoin Transaction Base

I wondered how big the volume of Bitcoin transaction database would be on real volumes. Those. Imagine that Bitcoin has become the official currency of Russia.
For example, I took such statistics of the central bank of Russia .
In general, the exact numbers are not interesting, we are important orders of values.
Suppose 2013 is 5 billion operations. We make one bitcoin transaction the minimum - equal to 1 kB.

So, 5 000 000 000 * 1000 = 5TBytes / year base growth for one country.
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I wonder if Moore’s law will succeed in personal data drives behind the development of Bitcoin? Is Bitcoin as a decentralized tool ready for such volumes? Will not too costly mining support lead to centralization of miners and weakening the system?

I would like to hear the opinion of Habravchan on this issue.