Not rushing to get married is cool. However, knowing why and what exactly you need to be doing while waiting is more important.
There are no guarantees, and life is not the same for everyone. Regardless, of available data, it is better to date for a while before broaching the subject of marriage. Researchers at Emory University studied over 3000 people who are currently married or have been married in the past. It found that couples who dated for two years had 20% fewer chances of divorce than those who dated for less than twelve months. Also, couples dating for over three years had 50% fewer chances of divorce.
The benefits of dating for a while before marrying are immense. It may not be a blueprint, but you should take time before plunging into the marriage institution.