The transfer function of a mass – spring – damper system is given by

\({\rm{G}}\left( {\rm{s}} \right) = \frac{1}{{{\rm{M}}{{\rm{s}}^2} + {\rm{Bs}} + {\rm{K}}}}\)

The frequency response data for the system are given in the following table.

\({\rm{\omega }}\) in rad/s	\(\left| {{\rm{G}}\left( {{\rm{j\omega }}} \right)} \right|\) in dB	\(\arg \left( {{\rm{G}}\left( {{\rm{j\omega }}} \right)} \right)\) in deg
0.01	-18.5	-0.2
0.1	-18.5	-1.3
0.2	-18.4	-2.6
1	-16	-16.9
2	-11.4	-89.4
3	-21.5	-151
5	-32.8	-167
10	-45.3	-174.5

The unit step response of the system approaches a steady state value of ________.