The transmission rates of GHSV-2, from a man to a woman, over the span of 365 days, and assuming no sex during outbreaks and an average of two sexy times per week, are:
10% with no condom and no daily suppressive therapy
5% with condom OR daily suppressive therapy
2.5% with condom AND daily suppressive therapy
Recent studies have suggested that use of condoms could lower male-to-female transmission rates by as much as 96%. This means that, potentially, if you use a condom and daily suppressive therapy, the risk of transmission could actually be closer to 1% per year.
The transmission rates from a woman to a man are:
4% with no condom and no daily suppressive therapy
2% with condom OR daily suppressive therapy
1% or less with condom AND daily suppressive therapy
Note that transmission rates are lower than asymptomatic shedding rates. This is because even if you are asymptomatically shedding, vigorous contact may be needed to work the virus into the skin of the other person. Additionally, the immune system of the uninfected partner can still act to prohibit the virus from penetrating the skin.
An article about the benefits of Valacyclovir in suppressive therapy:
My Partner has Herpes: What Can I do to Prevent Transmission?
The abstract that the above article references:
Once Daily Valacyclovir to Reduce the Risk of Transmission of Genital Herpes
Because GHSV-1 sheds 3-10 times as infrequently as GHSV-2, we can assume that the transmission rates are around 3-10 times lower. With use of a condom, the chances of transmission for an average of two sexy times per week, over 365 days, and no sex during outbreaks, would probably be less than 1%. And if you add daily suppressive therapy into the mix - again assuming no sex during outbreaks and intercourse on average twice a week - the risk of transmission would probably be much lower than 1% over the course of an entire year.
Ultimately, it's very difficult to spread pre-existing GHSV-1 via intercourse and it's also very difficult to spread it by receiving oral. And that's without condoms or daily suppressive therapy. The greatest risk, by far, for acquiring genital HSV-1 actually comes from those who have oral HSV-1 and give oral sex to those who do not have HSV-1.