Well why dont you look into it yourself and do some research, ya know, actually contribute to the sub? Instead of being the typical intellectual naysayer who just asks for sources and then follows it up with their feefees. The internet is right there for you...

Here some info I pulled up, took me 5 minutes:

FOR THE best available evidence about the extent of misattributed paternity we need to turn to medical research. This research is motivated by a medical condition or treatment, such as cystic fibrosis or bone marrow transplantation; the discovery of misattributed paternity is an unintended consequence.

The best British study, published in 1991, suggests a non-paternity rate of about 1 per cent. A 1992 French study indicates a rate of 2.8 per cent. A 1994 Swiss study has a maximum rate of 0.78 per cent. A 1999 Mexican study comes in at 11.8 per cent. And the best North American study, published in 2009, proposes a rate between 1 and 3 per cent. There are no published Australian studies.

Latin hos cuck at a ~10% rate, LOL. So much for their 'conservative catholic' culture...

These figures could all be distorted by the problem of who is willing to participate, which I mentioned earlier. Even so, there are some striking differences between countries. The rate of non-paternity in Mexico is especially high and the rate in Switzerland is especially low. Almost certainly there are underlying cultural differences in how marriage, sexuality and parenting are organised in these countries, which shape these different rates.

Maybe it has something to do with the difference in average incomes??? Beta Francs > Beta Pesos.

Now onto more relevant info:

I have done my own calculations based on British surveys in 1990 and 2000, for which raw data is available. They indicate an underlying non-paternity rate for children born in 1990 of somewhere between 0.7 per cent and 2 per cent. The estimated rate differs widely according to the marital status of the mother. For the offspring of married women, the rate is between 0.3 per cent and 0.6 per cent. For cohabiting women, it is between 1.1 per cent and 2.7 per cent. For other women – single, divorced, separated or widowed – it is between 2.3 per cent and 8.1 per cent. My calculations for the survey in 2000 indicate an underlying non-paternity rate for children born in that year of somewhere between 1.3 per cent and 3.4 per cent. The non-paternity rate rose between 1990 and 2000 for two main reasons: first, a higher proportion of women (married, cohabiting or other) with two or more sexual partners, and second, a higher proportion of births outside of marriage.

Get it? More sexual partners and more bastards => more cucks.

Whether girls today are having more sexual partners than before is irrelevant imo ( think yesteryears women were just big sluts). What is entirely relevant is the fact that marriage is on the decline.

So yes it is entirely possible that in the future we will see far more cuckolding, albeit in unmarried couples.

Bonus protip aka reason number 8789789787 not to marry:

These figures translate into more than five times as many tests per 1000 births in the United States than in Australia. One of the main reasons for the difference is that in Australian law the “marital presumption” that a husband is the father of his wife’s children also applies to de facto couples. (This was introduced without fanfare back in 1975.) In the United States the marital presumption doesn’t apply to de facto couples, which means that the paternity of children born outside marriage must be established legally. This routinely leads to paternity testing.

Source: http://insidestory.org.au/the-fatherhood-myth/