The optimization of NPE Vs CoGZ (corsika and observational data (proton))

NPE shift factor: 1.80	NPE shift factor: 1.84	NPE shift factor: 1.85	NPE shift factor: 1.86
NPE shift factor: 1.88	NPE shift factor: 1.90	NPE shift factor: 1.92	NPE shift factor: 1.94
NPE shift factor: 1.96	NPE shift factor: 1.98	NPE shift factor: 2.00