It is challenging to determine the exact number of stars that have ever existed in the universe or estimate how close we are to the final total. The vastness of the universe, the sheer number of galaxies, and the complexities of stellar formation and evolution make it a difficult calculation.
However, based on current scientific understanding, it is unlikely that we have reached 95% of the final total of stars. The observable universe contains billions of galaxies, each potentially hosting billions or even trillions of stars. Moreover, the universe is still relatively young, with an estimated age of about 13.8 billion years.
Stars continue to form in various regions of galaxies, and new stars are constantly being born even today. While the rate of star formation has varied over cosmic time, it is expected to continue for many billions of years to come.
Additionally, as the universe continues to expand, more regions of space become accessible for star formation. Over time, galaxies will merge, triggering new episodes of star formation as gas and dust come together.
Therefore, it is more likely that we are still far from the final total of stars that will exist in the universe. The actual number is uncertain and will depend on various factors, including the future evolution of galaxies, the availability of interstellar material for star formation, and the duration of stellar lifetimes.