This was the ASCE-7 data calculated by CaesarII,

Period(S) vs Acc.(g's) - Excell has rounded the numbers.

0.00 0.09
0.11 0.23
0.55 0.23
0.58 0.22
0.61 0.20
0.65 0.19
0.70 0.18
0.76 0.17
0.82 0.15
0.89 0.14
0.98 0.13
1.09 0.11
1.23 0.10
1.41 0.09
1.64 0.08
1.97 0.06
2.46 0.05
3.29 0.04
4.95 0.02
10.00 0.01

And then I fed in these data points, which were based on an excel file I made to calculate data points using EN1998-1.

0 0.1200
0.07 0.2000
0.15 0.3000
0.5 0.3000
0.51 0.3000
0.6 0.2500
0.66 0.2300
0.7 0.2100
0.74 0.2000
0.9 0.1700
1 0.1500
1.2 0.1300
1.23 0.1200
1.41 0.1100
1.64 0.0900
1.97 0.0800
2.46 0.0500
3.29 0.0300
4.95 0.0100
10 0.0100