As you’ve likely heard, if you live in the United States (and possibly elsewhere), same sex marriage has now been legalized. And it’s legal in Netherlands, Belgium, Spain, Canada, South Africa, Norway, Sweden, Portugal, Iceland, Argentina, Denmark, France, Brazil, Uruguay, New Zealand, Britain, Luxembourg, Finland and Ireland already. The trend to legalize same sex marriage started in 2001. And it’s been gaining popularity. At some point, it’s likely that same sex marriage will be universally legal. But when? Let’s ask Excel, using polynomial trendlines. To get started, let’s look at how many countries have legalized same sex marriage. The below spreadsheet lays out how many countries have legalized same sex marriage…