the divorce rate for couples who have been married for 30 years or more has been increasing, but it's important to note that specific divorce rates can vary based on the region, culture, and other social factors.
Historically, long-term marriages (30 years or more) tended to have lower divorce rates compared to marriages of shorter durations. However, in recent decades, there has been a shift in this trend. Factors such as changing societal norms, increased financial independence of women, and evolving attitudes towards divorce have contributed to higher divorce rates in longer-term marriages.
It's worth mentioning that divorce statistics can be subject to change over time, and I do not have access to real-time data. To get the most current divorce rate for couples with 30 years of marriage, you would need to consult up-to-date research or data sources from relevant government agencies or reputable research institutions.