Could be a couple of things.
I understand the divorce rate has been going down in recent years.
It’s also possible that a lot of Catholics have chosen to forego the annulment process and just get re-married civilly or in another church, for whatever reason. Some people believe the process is more expensive or time consuming than what it really is. Some don’t want to have any contact whatsoever with their ex, and some people think the person won’t cooperate so there is no hope in even trying (not true). There is also a belief among some that an annulment makes their children illegitimate (not true at all).
I suppose in order to really compare, we’d need to see a comparison between number annulments applied for vs. number of annulments granted.
The divorce rate has been going down in recent years. Part of it is economic and part is that the rates of people who get married has also gone down.
I know an awful lot of Catholics who have simply gotten remarried civilly and skipped the annulment process. Either they have left the Catholic Church for other more divorce tolerant religions or just left organized religion altogether.
Like the above poster said: in a negative light, more people might be heterodox enough to not care and just civilly remarry.
Also, the US is a very competitive marketplace in terms of religion. In a neopagan world there will be more invalid marriages out there; long-term fornicating couples getting drunk at bachelor’s parties and then a week later getting “married” because it’s a cultural tradition, and because it’s an entertaining and sentimentally sweet thing to do, etc., without a thought in the world about openness to life or divinely-bound lifelong commitment. A much higher rate of annulments than the 1960s shouldn’t exclusively be seen as a bad thing. It can also mean that mid-life converts take the Catholic Church very seriously.
Can you clarify what you mean by more invalid marriages? As long as a marriage is recognized by law, the Church considers it a valid marriage unless/until proven otherwise. Civil marriages and marriages performed by licensed Pagans are legally recognized and would be recognized by the Church unless they are invalid due to something like one spouse was previously married with no annulment or a close kinship. Did you mean more marriages that can be declared invalid due to the circumstances at the time of the ceremony?
And you touched on something I think plays a HUGE role in the number of annulments granted in the U.S.
According to the Church, reasons for annulment are not understanding the Catholic Church’s teachings regarding marriage when the ceremony took place. This includes believing marriage can be dissolved by divorce, not being open to life (contraception, refusing sex, etc.), no intent to remain faithful, gross immaturity and not fully understanding the duties and obligations of marriage. From what I understand, all of those things listed fall under the umbrella of consent. As in, you can’t consent to a marriage if you have no idea what you are really consenting to. Since the Church requires free consent for a marriage to be valid…well.
Frankly, I do not know many Americans who believe marriage can’t be dissolved by divorce, who intend to remain faithful even when they are at their ceremony, most people use some form of contraception, and not many understand the duties and obligations of marriage anymore. Culturally, we Americans who aren’t Catholic or who are and weren’t given proper religious instruction are are pretty much programmed to make marriages that can be annulled.
And, yup, I am a midlife convert who has added to the annulment stats because I got married many years ago. Well, I hope to have added to the stats. I finished my application a few weeks ago, but I do not have an annulment yet. My priest is sure I will receive a Decree of Nullity based on the facts surrounding my marriage, but it will take about a year. So, I guess I have contributed to the stats for 2014.