Name the total number of troops per one million being 2.76
create table table_30108346_1 (troops_per_one_million_population varchar, troops_per_$1_billion___usd___gdp varchar, PRIMARY KEY (troops_per_one_million_population))
select count(troops_per_one_million_population) from table_30108346_1 where troops_per_$1_billion___usd___gdp = "2.76"