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go - golang map prints out of order

Why is the map printing out of order, and how do I get it in to order?

package main

import (
    "fmt"
)

type monthsType struct {
    no   int
    text string
}

var months = map[int]string{
    1:"January", 2:"Fabruary", 3:"March", 4:"April", 5:"May", 6:"June",
    7:"July", 8:"August", 9:"September", 10:"October", 11:"Novenber", 12:"December",
}

func main(){
    for no, month := range months {
        fmt.Print(no)
        fmt.Println("-" + month)
    }
}

Prints out:

10-October
7-July
1-January
9-September
4-April
5-May
2-Fabruary
12-December
11-Novenber
6-June
8-August
3-March
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