The population of a country Dnalgne is 40 million in 1997 and increasing at a rate of 0.7 million per year.

The population of a country Dnalgne is 40 million in 1997 and increasing at a rate of 0.7 million per year. The average annual income of a person in Dnalgne during 1997 was 23000 dollars per year and increasing at a rate of 900 dollars per year.

How quickly was the total income of the entire population rising in 1997?