Good Years/Bad Years

I was thinking today about our anniversary and how long we have been married. Twelve years seems so long. I was thinking about how many of those years were good years and how many of them were bad years. I came to the conclusion that about two consecutive years out the twelve were what we would consider bad years. How many years of your marriage would you consider to have been bad years? Years that your marriage was very stagnate or went backwards. If you have not been married at least five years you may not have expierenced enough things together to really put a strain on your marriage. Physcologist claim that marriages tend to crumble in the 7-10 year window. How about you and your marriage?