I want to express an increase in annual sales of my company from 2013 to 2018. I have written the following sentence. I don't know why, but I feel that it's somehow strange, isn't it? If so, any suggestion.
I am proud to announce that the annual sales volume of my company in the 2018 financial year is(or has become) seven times(or sevenfold) as high as(or higher than) that in 2013.