Since it continues to increase and there is now nearly a 50/50 chance that a marriage will fail, will marriage survive or decline in future years? What are your thoughts?
"Marriage" will always be around.
Depending on how you define it.
If you're referring to the ritual performed by ceremony, and expectations of lifelong commitment, fidelity, and happiness, it's not going to survive. Simply because Disney and your grandparents lied to you.
If you're referring to the pair bonding mating process that leads to children, engendering deep "love" bonds that only last for about 4-7 years, (just long enough to stick together for the sake of raising a kid to the point that it/they can run from lions and not be murdered as an annoying parasite by the community or by the parents), then "marriage" will survive closer to its natural state rather than living up to idealized notions based on historic cultural training.
Historic cultural training based on small communities of people where the vast majority did not have freedom of mobility and life expectancy was nowhere near what it is today.
Much easier to promise and fulfill "til death do us part" when half your life is already over, no such thing as birth control, there's a significant risk of death with every childbirth, your life is where you grew up and you'll never see anything more than what (and whom) you already know.
Those are some discouraging statistics
IMO they can kinda be seen as encouraging.
Seems like people are less willing to try and live up to idealized notions handed down by their parents that just don't work and aren't based on reality.
IMO short (4-7 or so year) marriages that lead to children are a success and true indicators of "love."
Even those that last less than 5 years, but don't lead to children, are a greater indicator of "love."
Those "marriages" that last 60 years and the people say "oh they were my soul mate! We've loved each other this whole time and no one else, every day was happiness because we were together!" are a bunch of BS, full of lies and problems they just want to hide from people. Delusional at best.