Final answer:
Throughout the 1970s, a total of 315 national proficiency awards were added, with numbers varying each year and peaking in 1978-1979.
Step-by-step explanation:
In the 1970s, the number of national proficiency awards added is as follows:
1970: 44
1972: 25
1974: 40
1976: 26
1978: 19
Based on the data provided, a total of 154 national proficiency awards were added in the 1970s.
In the 1970s, the total number of national proficiency awards added can be calculated by analyzing the yearly data. Starting from the year 1970-1971 with 44 awards and ending with the year 1978-1979 which saw a significant increase to 54 awards, we see a fluctuation in numbers. When we add the respective yearly totals (44 for 1970-1971, 39 for 1971-1972, 25 for 1972-1973, 40 for 1973-1974, 36 for 1974-1975, 26 for 1975-1976, 32 for 1976-1977, 19 for 1977-1978, and 54 for 1978-1979), we get a total of 315 national proficiency awards added in the 1970s.