You have the following monthly returns on PumpJack Oil Co. and the U.S. stock market.

Month	Monthly total return on PumpJack Oil stock (%)	Monthly total return on the U.S. stock market (%)
1	1	7
2	15	2
3	-4	-5
4	25	14
5	27	2
6	4	-8

Estimate the market beta for PumpJack Oil Co.

Enter your estimate to 2 decimal places of accuracy. If beta is negative, include the minus sign in your answer.