Given the task definition and input, reply with output. In this task you are given a list of numbers and you need to find the average of each two consecutive values. The average of two numbers a and b is calculated as: (a + b) /2. The output should be a list of the averages of each two consecutive values. A list is presented with two brackets and comma-separated values, like: [1,2,3].

[-96, 77, 69, 76, 67, 100, -91, -86, -31, -67, 75, 84, -29]

[-9.5, 73.0, 72.5, 71.5, 83.5, 4.5, -88.5, -58.5, -49.0, 4.0, 79.5, 27.5]