If I wasn't on my phone if insert the gif from I Robot where the professor's hologram tells Will Smith that he has to 'Ask the right question.'
If more people are applying for EM, then yes, it is becoming more competitive. I'm sure most non-primary care specialties are seeing an increase in applicants, so they are becoming more competitive each year. The numbers are available each year as previously stated. For EM, it's getting more competitive every year overall.
It's like you individually banking on living longer based on the average life expectancy of the population. Meanwhile, ignoring your health history, bad habits, and risk taking.
The better question is how you personally compare to the trend in markers for matriculation. If your step scores are 240's with high passes as a U.S. MD, then it's likely not more competitive. If you are an IMG with a 210 and only passes, then yes it will be more competitive. It all depends on you compared the numbers, which are for the time being, increasing.