Foxy Ladies Investment Club

The Foxy Ladies Investment Club purchased 100 shares of common stock each in Coca-Cola, Intel, and Merck on January 02, 2010. A summary of their portfolio is given below:

Investment1/2/10

12/31/10

12/31/11

12/31/12

Coca-Cola$ 7,500.00

$ 5,262.50

$ 6,668.75

$ 6,700.00

Intel5,862.50

13,093.75

7,025.00

11,856.25

Merck6,425.00

7,962.50

10,600.00

14,750.00

Portfolio value$19,787.50

$26,318.75

$24,293.75

$33,306.25

Dividends per share12/31/10

12/31/11

12/31/12

Coca-Cola$0.60

$0.56

$0.61

Intel0.00

0.00

0.00

Merck1.48

1.74

1.98

Total per share$2.08

$2.30

$2.59

Refer to Foxy Ladies Investment Club. What was the portfolio's simple arithmetic average return per year from 2010 through 2012?