If you were the number used this year to compare with last year

The common saying says the expert keeps the gate a way and be the medium that we see today extensively what to pay attention to is CPI and GDP number like this, as an expert, you most pay attention to of is which several piece words?
The Yao view source nation statisticses always economic teacher in the bureau:
I feel that GDP, this data is really worth our paying attention to, because everyone knows for 2009 the middle of the years, the GDP growth rate of country is 9.2%, 2010 is 10.3%.From 9.2% to 10.3%, explain that we win this financial crisis in the world to the impact and influence that we bring, our work foundation at further popular solid, explain we the whole economy to steady develop aspect to go forward an one step more a little bit quickly.
Host:
If you were the number used this year to compare with last year, but we are careful in regard to distributing of this year number, discover to there is a curve that increases a fall from the beginning of the year to year-end, how explain a curve like this?