Portfolio returns, in %, over the first six months of a year were 0.12, 0.85, 0.08, 0.33, 1.23, and -0.02. The benchmark returns over the same six months were 0.16, 0.66, -0.73, 0.39, 1.62, and -0.03, respectively. What is the portfolio's average monthly active return over the period?